Abbie competed as a collegiate distance runner in various events, including the 1500m and 5k. She always had a passion for strength training, even though it sometimes conflicted with her endurance goals. Her path into research started with a love for the scientific process and the ability to find answers to specific questions. Abbie explains that the deeper someone gets into a subject, the more they realize how much they still have to learn.

The more you know, the more you don't know.

The conversation highlights the intensity of track events like the 800m and 1500m. Peter describes the 800m as a brutal two minute effort. Abbie adds that the 1500m is just as difficult because it requires maintaining a high pace for even longer. This level of physical exertion demands a specific type of mental and physical toughness.

Exercise is a remarkable tool to delay chronic disease and improve the quality of life. Peter explains that for women, the foundation for bone health is laid very early. A key insight is that osteoporosis is actually a childhood disease. This is because women reach their peak genetic bone density around the age of 19.

Osteoporosis is a childhood disease. Particularly for women, they are reaching their genetic ceiling at about the age of 19 in terms of bone density. From 19 until the end of life, they are hanging on to what they have got, and then they have all of these things that get in the way, such as menopause.

Parents of teenage girls should understand that this is the critical window for building bone mass. After age 19, the focus shifts to preserving what was built. Later life events like menopause create additional challenges to maintaining this density.

Exercise acts as a powerful medicine when it begins early in life. For young children, this should start as play before transitioning into more structured types of physical activity. Establishing a strong fitness base early makes it significantly easier to maintain health and fitness as one ages. For young girls specifically, the onset of menstruation often serves as a critical turning point where many choose to leave sports due to changes in their bodies or performance levels.

I grew up in a space where it was exercise more and eat less. We don't talk about it enough with young girls: what is menstruation and why is it healthy? When you go into sports, a lot of times it is like a badge of honor when you don't have your menstrual cycle. There is a lack of knowledge that it is very much related to nutrition.

Understanding the impact of the menstrual cycle on recovery, bloating, and mental health is essential for keeping girls engaged in athletics. Abbie notes that resistance training and running can be incredibly empowering tools because they allow young athletes to see tangible progress in their strength and fitness. However, the culture around youth sports needs to shift away from viewing a missed period as a sign of dedication and instead recognize it as a signal related to nutrition and overall health.

Encouraging young athletes to participate in a variety of sports rather than specializing early helps develop diverse muscle groups and movement patterns. This broad foundation is more beneficial for physical development than focusing on a single discipline too soon.

Resistance training stands out as the most effective method for preventing injuries in youth sports, yet it is often overlooked by coaches who prioritize time on the field. Starting with total body exercises using resistance bands, light weights, plyometrics, or medicine balls can build necessary strength. Abbie recalls finding value in specific lifts like the Romanian deadlift even as early as age 11 or 12.

Resistance training is the best prevention of injury. And oftentimes coaches don't include that. There's a lot of time on the soccer field or the softball field. And so total body exercises, whether we start with resistance bands or light weights or plyometrics or med balls, those are all really great things.

Intense exercise during the transition into reproductive years can delay the onset of puberty. This trend is especially common in gymnasts, runners, and swimmers. A delay in estrogen onset negatively impacts bone development. Abbie explains that what happens during childhood sets the stage for lifelong skeletal health.

Osteoporosis is a childhood disease of setting bone. And what we do with those young girls has a lifelong impact, whether that's a straight spine or a curved spine.

DEXA scans of high jumpers and gymnasts often reveal distinct curves in the spine. Many athletes are unaware of these shifts until they undergo whole body scans. While these curves are difficult to change by the time an athlete reaches college age, they can focus on stabilizing the musculoskeletal system. This issue is common in asymmetric sports like pole vaulting. Peter suggests that males may see fewer of these issues because they have more musculature around the spine or a later onset of puberty.

Young athletes have a unique capacity for physiological adaptation. While many people focus on maintaining fitness in adulthood, the years during high school and college offer a window where the body is incredibly responsive to training. Peter recalls having what felt like an unlimited capacity to train during his youth and expresses gratitude for taking advantage of that time. This early investment creates a foundation that benefits an individual for years to come.

Abbie points out that there is no specific ceiling for potential when someone is young. The body adapts quickly to different types of stress. Even when switching between sports that use different energy systems, like moving from cross country to basketball, the cumulative effect of training improves overall fitness. This adaptability allows young people to see significant changes in their physical capabilities through consistent effort.

I do not think there is a ceiling when you are young. The best part is seeing those training adaptations because the body is more responsive. You can see these really cool physiological adaptations by changing your training.

The benefits of training early go beyond just cardiovascular fitness. It has a lasting impact on skeletal health and helps establish the habit of taking control of one's physical state. Fitness is something that can be improved at any age, but the high level of responsiveness in youth sets a powerful stage for the future.

Nutrition for young women should be viewed as fuel for performance and recovery. Getting enough calories is often the biggest challenge for young athletes. Their schedules are usually packed with early practices and school, which leaves little time for proper meals. Peter observes this with his daughter, who often skips breakfast before cross country practice because she is not hungry in the morning. This pattern can lead to an energy deficit that impacts both health and performance.

When you are young or midlife and busy, you want to prioritize getting enough calories. You can take advantage of your training by what you eat before, during, and after. It is about providing nutrients so athletes can perform and recover better.

Abbie recommends focusing on caloric density to solve this problem. Instead of trying to eat more volume, athletes can make small swaps. Choosing whole milk over skim milk or adding nuts and seeds provides essential fats and more energy in a smaller serving. This is helpful because intense exercise often blunts hunger signals. Many women also experience GI distress due to stress or the menstrual cycle, which makes eating large meals difficult. Planning nutrition rather than relying on intuitive eating is often necessary. While many people currently focus on protein, carbohydrates remain vital for active young women.

Women can train effectively at any point in their menstrual cycle, but subjective feelings and recovery needs change depending on the phase. During the luteal phase, which occurs right before menstruation, it is common to feel increased fatigue and bloating. While these factors might affect how an athlete feels, research suggests that peak performance capabilities often remain intact. Abbie emphasizes that the focus for training should often shift toward recovery tools rather than just the performance itself.

Really bringing science in to help with recovery and inflammation and protein breakdown where we might do it differently in the luteal phase versus the follicular phase. So really using more tools to help with the recovery. Not necessarily that peak performance that seems to still be there.

In the first week of the cycle, known as the early follicular phase, hormones such as FSH, LH, and estradiol are at their lowest. During this time, the body tends to have higher carbohydrate oxidation, and athletes generally feel better and perform more steadily. Abbie suggests this is a period where training can feel less thought provoking and more about simply executing the work and fueling appropriately.

I would say in general follicular phase things are pretty steady. I would say with the loss of menstrual fluid, there's some things to consider. Obviously hydration, I mean we always think about iron.

While blood loss involves a loss of oxygen carrying capacity, the volume of loss is highly variable between individuals. From a nutritional standpoint, the early follicular phase does not necessarily drive a massive change in appetite, but it is important to match carbohydrate intake to the intensity of the training session. Regardless of the cycle phase, the primary goal remains eating enough to support the physical demand.

The late follicular phase occurs roughly between days seven and fourteen of the menstrual cycle. During this time, levels of FSH and estradiol rise as a woman approaches ovulation. This is often the period when women feel their best and are at their most fertile. While this physiological state may not always change the specific outcome of a performance, the perceived effort often feels easier. This can have a direct impact on the volume and quality of exercise, as well as the ability to optimize recovery and sleep.

This is the most important time because it is when a woman feels their best, they are also the most fertile. And so often this is when we see if we were to measure peak performance, maybe it feels a little bit easier.

From a research and coaching perspective, the ovulation window can be difficult to capture because it only lasts a few days. Abbie points out that some women may experience menses but not actually ovulate, adding to the variability of this phase. Because of these fluctuations, she typically avoids conducting performance tests during ovulation itself. Instead, she prefers to track changes during the more stable follicular or luteal phases to ensure the data is reliable.

The early luteal phase begins immediately after ovulation. During this time, estrogen levels drop slightly before starting a second rise, and progesterone begins to increase slowly. Most women do not experience a progesterone crash during this week. Because the hormonal shift is gradual, this phase is typically not a difficult period of the cycle.

For most women, this is not yet the period where they are experiencing the progesterone crash. And therefore, this is also not a particularly difficult week.

Unless someone tracks their cycle very closely, it can be hard to distinguish the transition from ovulation into the early luteal phase. Peter suggests that for many people, this week can be managed in the same way as the follicular phase.

The final week of the luteal phase involves a dramatic crash in progesterone and estrogen. This drop often drives significant emotional changes like increased anxiety and depression. While some women are more susceptible than others, it may be due to a higher density of progesterone receptors in the central nervous system. Beyond emotions, this phase also impacts thermoregulation and triggers higher levels of inflammation and water retention.

Some women have a greater density of progesterone receptors in the CNS that may render them more susceptible to that depletion. But I don't think we understand this yet.

Abbie suggests several strategies to prepare for this crash. High doses of omega 3 fatty acids, around two to three grams, can help down regulate inflammation. Supplementing with zinc and magnesium may assist with vasodilation and sleep disturbances that often occur during this time. Increasing intake of fruits and vegetables is another way to target the rising inflammation levels.

Creatine is particularly useful during the luteal phase because it helps manage fluid distribution. During the progesterone rise, protein breakdown and edema often increase. Creatine pulls extracellular fluid into the cells, which can reduce bloating and support athletic performance. Abbie notes that caffeine might also provide more significant benefits for fatigue when used during this specific part of the cycle.

Creatine was able to take that extracellular fluid and bring it into the cell. So help with fluid in the right places. And so indirectly that also supported performance.

Dosing strategies for creatine are shifting, especially for women in perimenopause or those focused on brain health. To reach muscle saturation faster, a loading phase of 20 grams daily for five days is often used. This is best achieved by splitting the total into four 5 gram doses. After the loading phase, a maintenance dose follows to keep levels steady.

I'm a big believer that 5 grams, but even now the data in our midlife women or the brain health is up to 10 grams.

While 5 grams was previously the standard maintenance dose, newer research on midlife women and cognitive health supports a higher dose of 10 grams. Peter notes that he has updated his maintenance recommendation to 10 grams daily. This approach may also help women manage symptoms like edema during the luteal phase.

The metabolic rate often increases by a few hundred calories during the luteal phase of the menstrual cycle. This can create a challenging situation. Many women feel poorly. They notice the scale moving up due to water retention. Because the number is higher, they might eat less. However, their body is actually losing stored energy. This leads to a mismatch of under-eating and increased cravings.

The scale might suggest you're gaining weight, but in reality you're losing stored energy. If I'm gaining weight on the scale and I have extracellular fluid, I don't feel very good. I'm not going to eat more often. I'll eat less. This is also when we see increased cravings. So it is this perfect storm for often under consumption of food.

Protein intake is a key factor during this time. Aim for at least 1.6 grams of protein per kilogram of body weight. Peter tries to hit 2 grams per kilogram. This provides a safety net for busy days. If you reach these levels, the potential decrease in muscle protein synthesis after ovulation is less concerning. Long term consistency is more important than a single day of missing a goal.

One of the benefits of exercising consistently is that a week here and there is not going to have these severe negative side effects. If a woman is getting 1.6 to 2 grams per kilo, we don't have to worry about it.

Older women need to pay more attention to protein due to anabolic resistance. Focusing on protein in the luteal phase helps with recovery and soreness. It also aids in injury prevention. Some people consider syncing their training intensity to their cycle. However, Abbie suggests it is often better to follow a standard periodized plan. You should accept that some days will feel harder than others based on where you are in your cycle.

Women should give themselves grace when they do not hit specific training goals or pacing targets. Rather than feeling like a failure, it is helpful to look at where hormones might play a role or if the body simply needs more recovery time. Empowering women to track their menstrual cycles helps them understand their own patterns, including how long they bleed and how their energy levels change. This awareness allows women to tease out whether they need to adjust their nutrition or medications or if their feelings are just a natural part of their hormonal cycle.

Consistency matters. We were not taught about our bleeding patterns, our changes in hormones, what is normal, or even the changes in brain and mental health. If there is a way that a woman can track that, it is really empowering versus just feeling terrible and wondering what is happening.

The lack of predictability in performance can be frustrating because female hormones shift significantly compared to the relatively steady state of male hormones. For elite athletes, using oral contraceptives to suppress the menstrual cycle by skipping the placebo week can offer a strategic advantage through consistency. While the literature does not show a direct performance boost from the hormones themselves, the reduction in variability and the management of symptoms like cramps and mood swings allow for more reliable training schedules.

Perimenopause is a critical window for making lifestyle changes that impact long term health. During this transition, women often experience changes in metabolism, muscle quality, and bone density. These shifts are often more significant during perimenopause than after menopause officially begins. Tracking hormones early is vital for recognizing these changes. Abbie recommends getting blood work done starting in your 30s to establish a baseline.

We are really diving into that perimenopause window because it seems that's where the time we really need to take advantage of lifestyle behavior changes to have this lifelong impact improve health span.

The most reliable time to check Follicle Stimulating Hormone or FSH is on day five of the menstrual cycle. When a woman is fertile, this number should be low. As it climbs toward 10, it indicates the start of perimenopause. For women who use an IUD, tracking can be more difficult, but it is still possible to monitor patterns. While at home urine tests are not exactly the same as blood work, they can help track daily hormone variations. These tools help women understand why they might be experiencing poor sleep or hot flashes.

Consistency in exercise is more valuable than high volume, especially for busy parents. High intensity workouts can provide significant benefits even when time is limited. Abbie notes that many women struggle with mom guilt when taking time for themselves. Overcoming this guilt is necessary because staying fit allows women to keep up with their children and grandchildren later in life.

Intensity is more important than volume and consistency is more important than volume. It will ultimately help you be a better mom, wife, et cetera. Grandmother.

The relationship between exercise volume and intensity changes based on how much time someone can commit to training. When time is unlimited, volume matters most for building conditioning. However, as the available training time decreases, intensity becomes more important. For someone with only 150 minutes a week to exercise, prioritizing intensity is necessary because they are not getting enough volume to maximize their fitness benefits. While professional athletes often spend 25 hours a week training with a large portion at low intensity, most people do not have that luxury.

If a person only has 150 minutes a week to exercise, you have to prioritize intensity because you're not really getting enough volume to maximize conditioning. If a person is willing to train 12 hours per week, then you have the luxury of relying on the volume for the benefits.

While high intensity training is efficient, focusing only on intensity can mean missing out on certain benefits and failing to build a strong fitness base. Abbie notes that for sedentary individuals, high intensity training can lead to faster improvements in VO2 max. This can be encouraging for those just starting out. She also highlights the value of exercise snacks, which are short bursts of high intensity activity. Research suggests that just doing high volume endurance training is not enough to maintain muscle size and quality. Incorporating intensity is essential for preserving muscle integrity regardless of performance goals.

Just doing volume doesn't help maintain the integrity of the muscle size and quality. It's very good at capillarization and blood flow. A little bit of intensity is going to matter no matter who you are.

For someone with only three hours a week to train, prioritizing the right balance of resistance and endurance is essential. Abbie suggests starting with two 30-minute sessions of whole-body progressive resistance training. These sessions should be efficient, using six to eight reps at high intensity with short rest periods between exercises. This approach ensures the weight room only takes up one hour of the weekly total.

We've done a protocol where it's 30 minutes, it's 6 to 8 reps, 30 seconds in between each exercise, 2 minutes in between sets. It's 30 minutes and we're done.

With the remaining two hours, the focus shifts to cardiovascular health. Abbie recommends at least one day of high-intensity interval training, though two days provide more value. A simple and effective protocol involves ten rounds of one minute on followed by one minute of rest. The intensity during the active minute should be high enough that completing an extra twenty seconds would feel impossible. Peter notes that heart rate is often a poor metric for such short intervals because it takes time to ramp up. Instead, using perceived exertion or fixed machine settings like power or speed ensures the effort stays high.

Pick an intensity that you couldn't go for a minute and 20 seconds. Pick an intensity that one minute is really hard and you need to take a break.

Even when time is extremely tight, consistency matters. If a full session is not possible, completing just six intervals still offers benefits. High-intensity training is particularly useful for midlife women as it helps maintain lean muscle mass alongside cardiovascular improvements.

Most people say they want to lose weight, but the real goal is usually fat loss. Abbie emphasizes that body composition is more important than the number on a scale. It is possible for weight to remain stable or even increase while the body becomes healthier and leaner. Using measurements like DEXA scans allows for calculating ideal weight based on body fat and muscle mass goals rather than arbitrary historical numbers.

A lot of times people think they want to weigh what they did in high school. But in reality, they would have to lose muscle for that. Giving them more of a target percent fat informs a better weight goal.

As women age, fat storage often shifts from the hips to the abdominal region. This increase in visceral fat around the organs raises the risk of cardiometabolic disease. When working toward a weight goal, a small calorie deficit is necessary. However, the strategy should focus on adding specific nutrients like fiber and protein to maintain satiety and muscle mass.

When using GLP-1 agonists for weight loss, the primary goal should be to maximize fat loss while preserving as much muscle as possible. If a person loses 20 pounds, the ideal outcome is for no more than five of those pounds to be muscle. This shift dramatically improves body composition and long-term health. Resistance training is the most critical strategy for maintaining lean mass and improving muscle quality during this process.

Protein has to be a conversation, particularly thinking about maintaining amino acids over the day. So consistently feeding, usually the goal is around 30 grams of protein evenly spaced throughout the day. We've also done some work with essential amino acids around exercise, which really helps optimize that maintenance of lean mass.

Daily protein intake should be aggressive. For an individual weighing 150 pounds, a target of 130 to 150 grams of protein per day is recommended. This high intake supports weight loss while protecting skeletal muscle. Peter notes that as these drugs become more common, users must be deliberate about their habits to avoid wasting away. Abbie adds that nutrient timing is especially important because these medications suppress appetite. Consuming amino acids before or after a workout can help maximize the physical benefits of exercise even when eating less.

I want to make sure that all the people that are out there wasting away have the insight into, hey, it doesn't have to be this way. I can still take this drug, I can still lose weight, but I also have to do something kind of deliberate to make sure I don't have a negative impact on my skeletal muscle.

Peter notes that patients using GLP-1 drugs like semaglutide or tirzepatide often receive little guidance on necessary dietary changes. These medications are powerful tools, but they require a deliberate shift in strategy. Instead of simply eating less, users must prioritize high quality foods to compensate for the significant drop in total calories. Without these changes to nutrition and training, users risk losing excessive muscle and bone mass.

Nobody explained to her that when you're on one of these drugs, you don't just go about your day eating less. You actually have to create a new diet that of course is lower in calories but has to be much higher in quality to compensate for the reduction in total energy.

Abbie explains that under-fueling often mimics the symptoms of perimenopause. This condition, known as relative energy deficiency syndrome, can cause fatigue and drops in estrogen and progesterone. When calories are too low, these hormonal changes are driven by the lack of fuel rather than ovarian decline. The use of GLP-1 drugs may increase the prevalence of these issues if users do not consume enough nutrients.

If you're eating less, it does impact hormones and you have the fatigue and the drop of progesterone and estrogen, but it's not necessarily driven by your ovaries, it's driven by the lack of caloric consumption.

A fitness routine for someone with limited time should balance resistance training and cardiovascular health. For a person with three hours available each week, a simple split works well. This involves three 30-minute strength sessions and three 30-minute cardio sessions. For those who are just starting, the cardio portion should focus more on low-intensity work. Abbie suggests swapping a high-intensity session for a second low-intensity day if the person is not yet fit. The strength training focuses on major muscle groups at least twice a week using a full-body or push-pull approach.

If she is unfit, that might be a lot for her. Probably change one of those HIIT days for a low intensity. So two low intensity, one HIIT, and three days in the gym.

Slow progress is often better for long-term health. Body recomposition takes time, especially when trying to preserve muscle while losing fat. This gradual pace is vital when using medications like tirzepatide. Peter prefers keeping patients on the lowest possible dose and extending the timeline to a full year. This approach allows the body to adapt slowly without losing significant lean mass. Abbie notes that tracking lean mass indicators is a helpful way to decide when to adjust medication levels.

We want the patient to be on the lowest dose possible and take as long as necessary to get there. I want this to take a year so the adaptation is gradual.

Abbie has tracked her own body metrics for more than twenty years. During her career as a distance runner, she suffered from nine stress fractures. These injuries occurred whenever her body fat dropped below fifteen percent. While she looked like a lean and healthy athlete to others, this specific level was too low for her own body. This highlights the importance of understanding personal set points rather than comparing yourself to others.

It's really important to use these numbers not to see how I compare to someone else, but to know that this is too much for my body at that point.

A missing menstrual cycle is a significant indicator of health for female athletes. Abbie explains that menses serves as a sign of overall well-being. Ideally, trainers and athletes should identify under-fueling issues before a woman loses her cycle entirely. In Abbie's case, her bone density was actually high, but her stress fractures were the result of a catabolic state caused by poor nutrient timing and under-consumption.

Menses is a really good indicator of overall health and well being. The hard part is we should catch it way before someone loses their menstrual cycle. There is some competition level that it might fluctuate, but you don't want to go the entire year without having your period.

Proper fueling involves both the total amount of food and the timing of that food. Abbie experienced severe gastrointestinal issues and frequent injuries because she trained twice a day with long gaps between meals. This lack of fuel around training sessions led to protein breakdown. Balancing training intensity and volume with consistent intake of protein and carbohydrates is essential for preventing repetitive strain injuries.

Abbie found that her approach to fitness changed significantly when she entered graduate school. She previously believed she needed to train constantly. She soon realized she could achieve her goals without excessive training by focusing on nutrient timing. Her routine shifted toward making every workout more effective through better dietary choices and specific supplements.

I learned that you didn't have to train as much and I really started to learn the keys of nutrient timing and optimizing nutrition.

She identifies several staple supplements that remain part of her routine. While whey protein is a common choice, Abbie often prefers essential amino acids. These aminos provide similar benefits to protein but absorb more quickly. They also offer a lighter alternative to milky protein shakes. Beyond these, her core list includes omega-3s, vitamin D, magnesium, and a multivitamin. She also includes a multi-strain probiotic to support her digestive health.

Abbie observed an 8% increase in body fat during her pregnancies. While she gained fat, she successfully maintained her muscle mass. After giving birth, it took roughly six months to return to her previous body composition. Achieving this does not require a frantic or extreme exercise schedule. Instead, the focus should be on finding specific times to train and staying consistent with the effort.

I have been the same body fat percentage and changed muscle depending on my training for the last 20 years. After I learned how to optimize in grad school, I realized you do not necessarily have to have a new set point. If you have that consistency, it can really help.

Maintaining fitness through life changes involves combining consistency with high intensity training and appropriate nutrition. While many believe pregnancy permanently alters their baseline, science shows that individuals can maintain their body composition over the long term by applying these principles. The goal is to optimize these factors rather than simply working harder without a plan.

Maintaining body composition after pregnancy or during midlife is often viewed as an uphill battle. Abbie suggests that the common narrative about midlife women losing muscle mass by default is not necessarily true. She has found success by periodizing her training and nutrition. Surprisingly, Abbie notes that she often eats more volume and more frequently when her goal is to get leaner. This approach focuses on prioritizing whole foods and consistent protein intake throughout the day rather than restricted windows.

The times that I want to be leaner is I'm actually eating more. I'm prioritizing whole foods, eating consistently throughout the day versus the times when I'm not paying as much attention is where I might gain some fat mass.

Many women struggle with chronic time-restricted feeding. While fasting has its place, constant restriction can lead to a lower metabolism and disrupted hunger hormones. This often results in overeating later in the day or negatively impacting muscle protein synthesis. Instead, starting the day with 30 grams of protein and vegetables can stimulate metabolism and provide necessary micro and macronutrients. Abbie also emphasizes training for childbirth as if it were an athletic event. By exercising consistently and maintaining a slight caloric surplus during pregnancy, she was able to return to her pre-pregnancy body composition within six months.

I believe birth is one of the most athletic events you'll do and you should train for it. I exercised consistently and I slowly increased my calories in a way that was almost like a refeed period so that I had a bit of a caloric surplus.

Abbie focused on resistance training during her third trimester. She prioritized muscle groups like the lats and legs to assist with the delivery process. Instead of high-intensity intervals, she shifted toward optimizing blood flow and managing muscle fatigue to prepare for birth.

I squatted, I did lots of lats. I was really thinking about what muscles are going to help deliver. Those are the ones that I worked up until the day I delivered.

After two natural deliveries, Abbie returned to walking within a few days. She resumed lightweight resistance training within two weeks. Her high activity level during pregnancy allowed for a faster recovery and a quicker return to movement.

During pregnancy, dietary preferences can shift in unexpected ways. Abbie experienced a strong aversion to animal proteins and protein shakes, which made meeting protein goals challenging. She adapted by prioritizing plant-based proteins because they were more palatable. While she does not typically eat many refined carbohydrates, she found herself craving donuts. Rather than strictly tracking macros, she focused on eating consistently to maintain a slight caloric surplus.

I didn't want to eat animal proteins, which was really hard and I didn't want a protein shake. None of that sounded good and so I definitely had to prioritize plant based proteins. That's just what tasted better.

The postpartum period brought different nutritional hurdles, including gastrointestinal distress and a temporary intolerance to lactose. Because caring for a newborn makes it difficult to sit down for full meals, the focus shifted toward convenience. Abbie utilized liquid foods and reintroduced protein shakes, omega 3, and creatine to help maintain her health and nutrition during this busy transition.

Nutrition during pregnancy is often handled as an extreme. Some use it as an excuse to eat whatever they want while others fail to pay attention to it. Nutrition should be a key priority for the baby's neural development and gut health. Prioritizing a variety of fruits and vegetables is essential for the child's growth.

Exercise is preparation for an athletic event. Delivering a baby requires strength and endurance. Women who have never exercised should start a routine and those who are already active should continue. There is better guidance now for exercise during pregnancy than in previous years.

To deliver a baby we should exercise. If you've never exercised, you should include something and if you've always exercised then you can continue that.

The postpartum phase introduces challenges like sleep deprivation and nursing. Staying active helps improve blood flow and physical resilience. This is vital for managing the demands of motherhood when rest is limited.

Peter notes that women are more likely to suffer from sarcopenia than men. This happens partly because women generally have less muscle mass and are less likely to engage in resistance training. Abbie shares data showing that only about 19 percent of women participate in resistance training. For those who do, the frequency is often limited to just one day per week.

The current generation of aging women is the first to benefit from Title IX. This means more women reaching menopause today have a history of exercise and sports. However, hormonal changes still create significant challenges. These shifts impact oxidative stress, inflammation, and blood flow, which can harm cardiometabolic health and muscle retention.

Abbie explains that muscle quality changes most significantly during the perimenopausal years. While women might maintain muscle size through some activity, the internal structure of the muscle often degrades. She compares this change to the difference between two cuts of meat.

Significant changes in muscle quality happen in perimenopause. The way I describe that is very much like a rib eye versus a filet.

This marbling effect involves fat accumulation within the muscle. Peter points out that fat inside the cells is particularly concerning because it contributes to insulin resistance. Abbie's research suggests that perimenopausal women show reduced metabolic flexibility at moderate intensities. This makes it harder for the body to switch efficiently between burning fat and carbohydrates for fuel.

Exercise improves metabolic flexibility even when hormones change during perimenopause. High intensity interval training is especially helpful because it speeds up fat oxidation after the workout. While the body uses carbohydrates during the actual exercise, the period after high intensity work stimulates metabolic flexibility regardless of age. Research suggests that eating protein post exercise might optimize blood flow. It also does not seem to blunt the insulin response, which helps maintain metabolic flexibility after intense efforts.

Post exercise, high intensity work blunts any of our hormonal impact, meaning exercise will stimulate metabolic flexibility regardless of hormones and age.

Measuring metabolic flexibility involves looking at how the body switches from burning fat to burning carbohydrates. Abbie explains that they use indirect calorimetry to track this change. Instead of seeing it as a simple switch at a specific threshold, researchers use mathematical models to understand it as a continuum. This approach provides a better picture of how well the body shifts its fuel sources as exercise intensity increases.

Measuring metabolic flexibility involves tracking how well the body switches between burning fats and carbohydrates at different exercise intensities. Research explores how these oxidation percentages change as women transition through pre, peri, and post-menopause. Several factors likely drive metabolic inflexibility as people age, including increased oxidative stress, inflammation, and changes in insulin sensitivity. It is important to distinguish between changes caused by chronological aging, which also occur in men, and those specifically driven by female hormonal shifts.

How do we use lifestyle changes to optimize that or overcome some of those hormonal components? It would be great if adding hormones would really help overcome that. But you still have to add lifestyle. So what is that combination?

While hormone replacement therapy is an area of ongoing study, exercise remains the most potent tool for improving metabolic flexibility. For many people, time is limited, so identifying the most effective training methods is essential. Nutrition also plays a supporting role. Consuming protein near a workout or choosing lower glycemic index foods can help optimize metabolic health. These small dietary adjustments become more significant during the 40s and 50s when women experience notable changes in muscle quality and cardiovascular health.

Abbie highlights the need for better research on how women can combine GLP-1 medications with a minimal effective dose of exercise and nutrition. Many women struggle to feel good while on these drugs. Mental health also plays a significant role in their success. Another major area of interest is menopause hormone therapy. Hormones might not build muscle directly. However, they can provide the energy and recovery needed for higher training volumes.

Increased activity can lead to a higher risk of injuries, such as Achilles tendon tears. Abbie and Peter both identify this as a significant concern. Peter suggests that while hormones might get someone off the couch, they do not inherently protect the tendons. Reducing injury risk requires specific training focused on the soleus and gastrocnemius muscles. It also requires dedicated tissue pliability work. These methods could reduce the risk of tears by 80 percent, though clinical trials for such specific training are difficult to conduct.

The GLP-1 is a different class and it comes with a whole set of if you take it, great, but you got to do X, Y, and Z and it's just as much work.

Peter notes that GLP-1s are different from drugs for blood pressure or cholesterol. With most medications, a patient simply takes the pill and sees results. GLP-1s require the patient to take on the responsibility of managing their lifestyle alongside the drug. Physicians must help patients understand that the benefits of these medications come with the hard work of incorporating specific health behaviors.

Many women feel pressured by absolute rules in fitness, such as the idea that they must only lift heavy weights or only do high intensity training. Abbie suggests that the most important thing is simply staying active. While much of our strength research comes from studies on men, the female muscle responds in a very similar way. Women can gain significant strength and muscle using traditional methods. They may just need specific modifications for rest, recovery, and joint health.

Strength training works and a woman is going to gain strength and gain muscle, but not to the same absolute effect as a man.

A major focus of training as we age should be power. Humans lose explosiveness and power long before they lose pure strength or muscle size. This decline starts as early as our twenties. While Peter no longer does high-risk movements like massive box jumps, he still incorporates controlled power movements to keep his muscles responsive. This is especially vital for women. They may naturally have more slow-twitch fibers and might lose fast-twitch fibers more quickly as they age.

Power is not just about being an athlete. It is a fundamental safety requirement for daily life. For example, if a young person stumbles off a curb, they have the power to quickly reposition their feet and avoid a fall. An older person who lacks that explosive muscle response is much more likely to fall and suffer an injury. Training for power in midlife creates a buffer that helps maintain independence and safety later on.

If I do things right now in my 40s to maintain power, it will help. Inevitably we are going to lose that. I want to ward that off as soon as I can so that I have that ability to maintain power longer.

Women often experience joint pain during menopause, which makes high-impact training like plyometrics difficult. Peter notes that hormone therapy can often alleviate these issues. This makes it easier to maintain an active lifestyle instead of training through constant pain.

Even for a woman in her late 60s or 70s, it is never too late to begin a resistance training program. The body can build muscle and strength at any age.

You can start at any time. If you can start sooner, that is better. But you can gain strength and muscle at any age. Obviously there are some challenges and you might change your volume and intensity, but you can 100% start.

Abbie suggests hiring a personal trainer through a referral from a physical therapist to get started. For a total beginner, the focus should be on creating a stimulus slightly higher than their current activity level. A beginner routine should be a total body program. Machines are often better than free weights for a new trainee. It should include glute activation to help with stability and prevent falls. Standing banded work can help wake up these muscles before moving to exercises like the leg press.

The routine should involve a push and pull for every muscle group. It is important to hit the hamstrings, calves, and all aspects of the shoulder joint. Lunges might be too challenging initially and can be avoided in the early stages. The goal is to control health span through consistent, deliberate movement.

A training plan for an older beginner should start with three days of resistance training each week. Aerobic exercise can happen most days to build a base. It is helpful to use an every other day schedule for lifting to ensure enough recovery time. When moving away from machines, the priority is checking if the person can perform movements safely while deloaded. Once they show good form with no weight, they can slowly add resistance.

Grip strength is a vital part of functional fitness that is often overlooked. Carries are an excellent way to build this strength. Peter suggests using sub-maximal efforts where the person holds a light weight for one minute and rests for one minute. This builds endurance without the risk of failure. Even at an advanced age, the body remains highly adaptable to heavy loads.

We have seen older adults gain massive amounts of strength in 24 weeks doing things like the squat and bench press. You can start at any age.

While some might prefer a leg press for safety, others can learn to use a barbell for deadlifts. The key is starting where the individual is and progressing steadily.

Exercise has a profound impact on mental health, specifically for managing anxiety and brain fog. Abbie uses the analogy of having twenty squirrels in her brain. Exercise is what finally tames them. Many women feel their mental struggles are unique, but both resistance and aerobic training can significantly improve focus and cognition.

I always use the analogy of there's days that I feel like I have about 20 squirrels in my brain and it's when I go exercise that the squirrels finally tame down.

Rigid rules in fitness and nutrition can be harmful. The idea that women must follow one specific path in midlife ignores individual needs. Pragmatic thinking is often better than black and white rules. Most people are just trying to be consistent with their movement. Exercise is powerful regardless of the exact method.

There are also specific injury patterns worth noting. Peter mentions that his wife has experienced high hamstring issues after pregnancy. Abbie notes that ACL injuries seem to be increasing in women during midlife. This might relate to changes in muscle and tendon stiffness caused by hormone shifts rather than just aging.

Perimenopause involves hormonal changes that may lead to higher inflammation. High-sensitivity CRP is one marker used to track this. It is still unclear if hormone therapy directly mitigates this specific inflammatory response. Understanding how these hormonal shifts impact the musculoskeletal system is an important area for future research.

Creatine offers benefits for women, though it is not a magic bullet for those in midlife. More important is the conversation around how physiology and mental health intersect during this stage of life. Many women feel invalidated by their medical experiences, particularly when discussing hormones. Peter notes that the medical system has significantly failed women over the last 25 years by mismanaging hormone therapy. While some doctors are hesitant to prescribe hormones to women who are further past the onset of menopause, research suggests that even women in their sixties can safely benefit from treatment.

I have yet to find a better example of how the medical system has screwed up in the last 25 years than on this issue. 50% of the population have been hurt by this.

Lifestyle changes and hormone therapy should not be viewed as mutually exclusive. While hormones provide independent benefits regardless of activity level, combining them with exercise creates a powerful additive effect. When it comes to training, the effectiveness of a workout often depends on how well a person can stick to the routine. In a world where time is limited, the intensity of the stimulus becomes paramount.

The shorter your volume of training, the more important the intensity of that is. If you are only going to lift twice a week for 30 minutes, you cannot phone those in. You have to actually do the work.

If training volume is high, there is more room for error in intensity. However, if an individual only has two short windows per week to exercise, those sessions must be pushed to near failure to be effective. Peter emphasizes that patients should not accept a refusal from a doctor regarding hormone therapy. If a practitioner is unwilling or incompetent in providing modern hormone options, it is time to find a new provider who understands the current science.

Training intensity requirements shift based on your fitness history. If you are starting from a low base, almost any stimulus will provoke a change. For those with a long history of training, significant effort is required to see progress. However, as people age, the focus often shifts toward maintenance. Maintaining muscle mass and peak respiratory fitness still requires some intensity, even if the total volume of training is lower.

The difference is you and I did workouts in our teens and twenties where we were left vomiting at the end of those workouts. That was actually the norm. So compared to that, we're not crushing anything today, but we're still working a lot harder than most people appreciate.

For many busy professionals, finding time to exercise is difficult. Abbie notes that in certain phases of life, like raising children, maintenance is a valid and successful goal. Peter emphasizes that while not every workout needs to be at maximum intensity, beginners must learn what real effort feels like. Many people mistakenly believe they are working in a productive zone when they are actually performing recovery level activity.

I think this is such a gift to be able to exercise. It is such a remarkable stimulus. It's one thing that I think will never be displaced by a pill. There are far too many benefits that we get from exercise that could ever be displaced.

There has been a significant cultural shift in how women view resistance training. Twenty years ago, women often overlooked lifting weights. Today, there is a growing awareness of its benefits. Peter observes that even women who do not lift weights often say they know they should.

I do think today women are realizing the importance of resistance training, perhaps in a way that they didn't 20 years ago. Now, when I talk to women and I ask them what they're doing for exercise, even the ones who don't resistance train will usually follow it up with something like, "But I know I probably should be."

This awareness marks a new era. Science helps empower women to prioritize both cardio and resistance training. Abbie notes the importance of creating space for these activities to improve health through evidence-based exercise.