When Discipline Stops Working

What Women Were Never Told About Weight, Aging, and Control

The Science They Never Told Us

This is the first episode of 2026, and I wanted to start the year by slowing things down, getting a bit personal instead of chasing the latest talking points.

At the end of last year, I spent time reading a few books that genuinely stopped me in my tracks. Not because they offered a new diet or a new protocol, but because they challenged something much deeper: the story we’ve been told about discipline, control, and women’s bodies.

There is a reason women’s bodies change across the lifespan. And it has very little to do with willpower, discipline, or personal failure.

In Why Women Need Fat, evolutionary biologists William Lassek and Steven Gaulin make the case that most modern conversations about women’s weight are fundamentally misinformed. Not because women are doing something wrong, but because we’ve built our expectations on a misunderstanding of what female bodies are actually designed to do.

A major part of their argument focuses on how industrialization radically altered the balance of omega-6 to omega-3 fatty acids in the modern food supply, particularly through seed oils and ultra-processed foods. They make a compelling case that this shift plays a role in rising obesity and metabolic dysfunction at the population level.

I agree that this imbalance matters, and it’s a topic that deserves its own full episode. At the same time, it does not explain every woman’s story. Diet composition can influence metabolism, but it cannot override prolonged stress, illness, hormonal disruption, nervous system dysregulation, or years of restriction. In my own case, omega-6 intake outside of naturally occurring sources is relatively low and does not account for the changes I’ve experienced. That matters, because it reminds us that biology is layered. No single variable explains a complex adaptive system.

One of the most important ideas in the book is that fat distribution matters more than fat quantity.

Women do not store fat the same way men do. A significant portion of female body fat is stored in the hips and thighs, known as gluteofemoral fat. This fat is metabolically distinct from abdominal or visceral fat. It is more stable, less inflammatory, and relatively enriched in long-chain fatty acids, including DHA, which plays a key role in fetal brain development.

From an evolutionary standpoint, this makes sense. Human infants are born with unusually large, energy-hungry brains. Women evolved to carry nutritional reserves that could support pregnancy and lactation, even during times of scarcity. In that context, having fat on your lower body was not a flaw or a failure. It was insurance.

From this perspective, fat is not excess energy. It is deferred intelligence, stored in anticipation of future need. This is where waist-to-hip ratio enters the conversation.

Across cultures and historical periods, a lower waist-to-hip ratio in women has been associated with reproductive health, metabolic resilience, and successful pregnancies. This is not about thinness, aesthetics, or moral worth. It is about fat function, not fat fear, and about how different tissues behave metabolically inside the body. It is about where fat is stored and how it functions.

And in today’s modern culture we have lost that distinction.

Instead of asking what kind of fat a woman carries, we became obsessed with how much. Instead of understanding fat as tissue with purpose, we turned it into a moral scoreboard. Hips became a problem. Thighs became something to shrink. Curves became something to discipline.

Another central idea in Why Women Need Fat is biological set point.

The authors argue that women’s bodies tend to defend a natural weight range when adequately nourished and not under chronic stress. When women remain below that range through restriction, over-exercise, or prolonged under-fueling, the body does not interpret that as success. It interprets it as threat.

Over time, the body adapts, not out of defiance, but out of protection.

Metabolism slows. Hunger and fullness cues become unreliable. Hormonal systems compensate. When the pressure finally eases, weight often rebounds, sometimes beyond where it started, because the body is trying to restore safety.

From this perspective, midlife weight gain, post-illness weight gain, or weight gain after years of restriction is not mysterious. It is not rebellion. It is regulation.

None of this is taught to women.

Instead, we are told that if our bodies change, we failed. That aging is optional. That discipline and botox should override biology. That the number on the scale tells the whole story.

So, before we talk about culture, family, trauma, or personal experience, this matters:

Women’s bodies are not designed to stay static.
They are designed to adapt.

Once you understand that, everything else in this conversation changes.


Why the Body Became the Battlefield

This is where historian Joan Jacobs Brumberg’s work in The Body Project: An Intimate History of American Girls, provides essential context, but it requires some precision.

Girls have not always been free from shame. Shame itself is not new. What has changed is what women are taught to be ashamed of, and how that shame operates in daily life.

Brumberg asks a question that still feels unresolved today:
Why is the body still a girl’s nemesis? Shouldn’t sexually liberated girls feel better about themselves than their corseted counterparts a century ago?

Based on extensive historical research, including diaries written by American girls from the 1830s through the 1990s, Brumberg shows that although girls today enjoy more formal freedoms and opportunities, they are also under more pressure and at greater psychological risk. This is due to a unique convergence of biological vulnerability and cultural forces that turned the adolescent female body into a central site of social meaning during the twentieth century.

In the late nineteenth and early twentieth centuries, girls did not typically grow up fixated on thinness, calorie control, or constant appearance monitoring. Their diaries were not filled with measurements or food rules. Instead, they wrote primarily about character, self-restraint, moral development, relationships, and their roles within family and community.

One 1892 diary entry reads:

“Resolved, not to talk about myself or feelings. To think before speaking. To work seriously. To be self-restrained in conversation and in actions. Not to let my thoughts wander. To be dignified. Interest myself more in others.”

In earlier eras, female shame was more often tied to behavior, sexuality, obedience, and virtue. The body mattered, but primarily as a moral symbol rather than an aesthetic project requiring constant surveillance and correction.

That changed dramatically in the twentieth century.

Brumberg documents how the mother-daughter connection loosened, particularly around menstruation, sexuality, and bodily knowledge. Where female relatives and mentors once guided girls through these transitions, doctors, advertisers, popular media, and scientific authority increasingly stepped in to fill that role.

At the same time, mass media, advertising, film, and medicalized beauty standards created a new and increasingly exacting ideal of physical perfection. Changing norms around intimacy and sexuality also shifted the meaning of virginity, turning it from a central moral value into an outdated or irrelevant one. What replaced it was not freedom from scrutiny, but a different kind of pressure altogether.

By the late twentieth century, girls were increasingly taught that their bodies were not merely something they inhabited, but something they were responsible for perfecting.

A 1982 diary entry captures this shift starkly:

“I will try to make myself better in any way I possibly can with the help of my budget and baby-sitting money. I will lose weight, get new lenses, already got a new haircut, good makeup, new clothes and accessories.”

What changed was not the presence of shame, but its location. Shame moved inward.

Rather than being externally enforced through rules and prohibitions, it became self-policed. Girls were taught to monitor themselves constantly, to evaluate their bodies from the outside, and to treat appearance as the primary expression of identity and worth.

Brumberg is explicit on this point. The fact that American girls now make their bodies their central project is not an accident or a cultural curiosity. It is a symptom of historical changes that are only beginning to be fully understood.

This is where more recent work, such as Louise Perry’s The Case Against the Sexual Revolution, helps extend Brumberg’s analysis into the present moment. Perry argues that while sexual liberation promised autonomy and empowerment, it often left young women navigating powerful biological and emotional realities without the social structures that once offered protection, guidance, or meaning. In that vacuum, the body became one of the few remaining sites where control still seemed possible.

The result is a paradox. Girls are freer in theory, yet more burdened in practice. The body, once shaped by communal norms and shared female knowledge, becomes a solitary project, managed under intense cultural pressure and constant comparison.

For many girls, this self-surveillance does not begin with magazines or social media. It begins at home, absorbed through tone, comments, and modeling from the women closest to them.

Brumberg argues that body dissatisfaction is often transmitted from mother to daughter, not out of cruelty, but because those mothers inherited the same aesthetic anxieties. Over time, body shame becomes a family inheritance, passed down quietly and persistently.

Some mothers transmit it subtly.

Others do it bluntly.

This matters not because my experience is unique, but because it illustrates what happens when a body shaped by restriction, stress, and cultural pressure is asked to perform indefinitely. Personal stories are often dismissed as anecdotal, but they are where biological theory meets lived reality.

If you want to dive deeper into this topic:


Where It All Began: The Messages That Shape Us

I grew up in a household where my body was not simply noticed. It was scrutinized, compared, and commented on. Comments like that do not fade with time. They shape how you see yourself in mirrors and photographs. They teach you that your body must be managed and monitored. They plant the belief that staying small is the price of safety.

So, I grew up believing that if I could control my body well enough, I could avoid humiliation. I could avoid becoming the punchline. I could avoid being seen in the wrong way.

For a while, I turned that fear into discipline.


The Years Before the Collapse: A Lifetime of Restriction and Survival

Food never felt simple for me. Long before bodybuilding, chronic pain, or COVID, I carried a strained relationship with eating. Growing up in a near constant state of anxiety meant that hunger cues often felt unpredictable. Eating was something to plan around or push through. It rarely felt intuitive or easy.

Because of this, I experimented with diets that replaced real meals with cereal or shakes. I followed plans like the Special K diet. I relied on Carnation Instant Breakfast instead of full meals. My protein intake was low. My fear of gaining weight was high. Restriction became familiar.

Top left is when I started working out obsessively at age 16, top right and bottom photo are from middle school when I was at my “heaviest” that drove the disordered behaviors.

In college, I became a strict vegetarian out of compassion for animals, but I did not understand how to meet my nutritional needs. I was studying dietetics and earning personal training certifications while running frequently and using exercise as a way to maintain control. From the outside, I looked disciplined. Internally, my relationship with food and exercise remained tense and inconsistent.

Later, I became involved in a meal-replacement program through an MLM. I replaced two meals a day with shakes and practiced intermittent fasting framed as “cleanse days.” In hindsight, this was structured under-eating presented as wellness. It fit seamlessly into patterns I had lived in for years.

Eating often felt overwhelming. Cooking felt like a hurdle. Certain textures bothered me. My appetite felt fragile and unreliable. This sensory sensitivity existed long before the parosmia that would come years later. From early on, food was shaped by stress rather than nourishment.

During this entire period, I was also on hormonal birth control, first the NuvaRing and later the Mirena IUD, for nearly a decade. Long-term hormonal modulation can influence mood, inflammation, appetite, and weight distribution. It added another layer of complexity to a system already under strain.

Looking back, I can see that my teens and twenties were marked by near constant restriction. Restriction felt normal. Thriving did not.

The book Why Women Need Fat discusses the idea of a biological weight “set point,” the range a body tends to return to when conditions are stable and adequately nourished. I now understand that I remained below my natural set point for years through force rather than balance. My biology never experienced consistency or safety.

This was the landscape I carried into my thirties.


The Body I Built and the Body That Broke

By the time I entered the bodybuilding world in 2017 and 2018, I already had years of chronic under-eating, over-exercising, and nutrient gaps behind me. Bodybuilding did not create my issues. It amplified them.

I competed in four shows. People admired the discipline and the physique. Internally, my body was weakening. I was overtraining and undereating. By 2019, my immune system began to fail. I developed severe canker sores, sometimes twenty or more at once. I started noticing weight-loss resistance. Everything I had done in the past, was no longer working. On my thirty-fifth birthday, I got shingles. My energy crashed. My emotional bandwidth narrowed. My body was asking for rest, but I did not know how to slow down.

Dive deeper into my body building journey here:

Around this time, I was also navigating eating disorder recovery. Learning how to eat without panic or rigid control was emotionally exhausting even under ideal circumstances… but little did I know things were about to take a massive turn for the worst.


COVID, Sensory Loss, and the Unraveling of Appetite

After getting sick with the ‘vid late 2020, everything shifted again. I developed parosmia, a smell and taste distortion that made many foods taste rotten or chemical. Protein and cooked foods often tasted spoiled. Herbs smelled like artificial chemical. Eating became distressing and, at times, impossible.

My appetite dropped significantly. There were periods where my intake was very low, yet my weight continued to rise. This is not uncommon following illness or prolonged stress. The body often shifts into energy conservation, prioritizing survival overweight regulation.

Weight gain became another source of grief. Roughly thirty pounds over the next five years. I feel embarrassed and avoid photographs. I often worry about how others will perceive me.

If this experience resonates, it is important to say this clearly: your body is not betraying you. It is responding to stress, illness, and prolonged strain in the way bodies are designed to respond.


Why Women’s Bodies Adapt Instead of “Bounce Back”

When years of restriction, intense exercise, chronic stress, illness, hormonal shifts, and emotional trauma accumulate, the body often enters a protective state. Metabolism slows. Hormonal signaling shifts. Hunger cues become unreliable. Weight gain or resistance to weight loss can occur even during periods of low intake, because energy regulation is being driven by survival physiology rather than simple calorie balance.

This is not failure. It is physiology.

The calories-in, calories-out model does not account for thyroid suppression, nervous system activation, sleep disruption, pain, trauma, or metabolic adaptation. It reduces a complex biological system to arithmetic.

Women are not machines. We are adaptive systems built for survival. Sometimes resilience looks like holding onto energy when the body does not feel safe.


The Systems That Reinforce Shame

Despite this biological reality, we live in a culture that ties women’s value to discipline and appearance. When women gain weight, even under extreme circumstances, we blame ourselves before questioning the system.

Diet culture frames shrinking as virtue.

Toxic positivity encourages acceptance without context.

Industrial food environments differ radically from those our ancestors evolved in.

Medical systems often dismiss women’s pain and metabolic complexity.

Social media amplifies comparison and moralizes body size.

None of this is your fault. And all of it shapes your experience.

This is why understanding the science matters. This is why telling the truth matters. This is why sharing stories matters.


In the book, More Than a Body, Lindsay and Lexie Kite describe how women are taught to relate to themselves through constant self-monitoring. Instead of living inside our bodies, we learn to watch ourselves from the outside. We assess how we look, how we are perceived, and whether our bodies are acceptable in a given moment.

This constant self-surveillance does real harm. It pulls attention away from hunger, pain, fatigue, and intuition. It trains women to override bodily signals in favor of appearance management. And over time, it creates a split where the body is treated as a project to control rather than a system to understand or care for.

When you layer this kind of self-objectification on top of chronic stress, restriction, illness, and trauma, the result is not empowerment. It is disconnection. And disconnection makes it even harder to hear what the body needs when something is wrong.

Weight gain is not just a biological response. It becomes a moral verdict. And that is how women end up fighting bodies that are already struggling to keep them alive.

The Inheritance Ends Here

For a long time, I believed that breaking generational cycles only applied to mothers and daughters. I do not have children, so I assumed what I inherited would simply end with me, unchanged.

Brumberg’s work helped me see this differently.

What we inherit is not passed down only through parenting. It moves through tone, silence, and self-talk. It appears in how women speak about their bodies in front of others. It lives in the way shame is normalized.

I inherited a legacy of body shame. Even on the days when I still feel its weight, I am choosing not to repeat it.

For me, the inheritance ends with telling the truth about this journey and refusing to speak to my body with the same cruelty I absorbed growing up. It ends here.


Closing the Circle: Your Body Is Not Broken

I wish I could end this with a simple story of resolution. I cannot. I am still in the middle of this. I still grieve. I still struggle with eating and movement. I am still learning how to inhabit a body that feels unfamiliar.

But I know this: my body is not my enemy. She is not malfunctioning. She is adapting to a lifetime of stress, illness, restriction, and emotional weight.

If you are in a similar place, I hope this offers permission to stop fighting yourself and start understanding the patterns your body is following. Not because everything will suddenly improve, but because clarity is often the first form of compassion.

Your body is not betraying you. She is trying to keep you here.

And sometimes the most honest thing we can do is admit that we are still finding our way.


References

  1. Brumberg, J. J. (1997). The Body Project: An Intimate History of American Girls. Random House.
  2. Lassek, W. D., & Gaulin, S. J. C. (2011). Why Women Need Fat: How “Healthy” Food Makes Us Gain Excess Weight and the Surprising Solution to Losing It Forever. Hudson Street Press.
  3. Kite, L., & Kite, L. (2020). More Than a Body: Your Body Is an Instrument, Not an Ornament. Houghton Mifflin Harcourt.

Scientific and academic sources

  1. Lassek, W. D., & Gaulin, S. J. C. (2006). Changes in body fat distribution in relation to parity in American women. Evolution and Human Behavior, 27(3), 173–185.
  2. Lassek, W. D., & Gaulin, S. J. C. (2008). Waist–hip ratio and cognitive ability. Proceedings of the Royal Society B, 275(1644), 193–199.
  3. Dulloo, A. G., Jacquet, J., & Montani, J. P. (2015). Adaptive thermogenesis in human body-weight regulation. Obesity Reviews, 16(S1), 33–43.
  4. Fothergill, E., et al. (2016). Persistent metabolic adaptation after weight loss. Obesity, 24(8), 1612–1619.
  5. Kyle, U. G., et al. (2004). Body composition interpretation. American Journal of Clinical Nutrition, 79(6), 955–962.
  6. Simopoulos, A. P. (2016). Omega-6/omega-3 balance and obesity risk. Nutrients, 8(3), 128.

Trauma, stress, and nervous system context

  1. Sapolsky, R. M. (2004). Why Zebras Don’t Get Ulcers. Henry Holt and Company.
  2. Walker, P. (2013). Complex PTSD: From Surviving to Thriving. Azure Coyote Books.

Move More, Eat Less? The Lie That Won’t Die

The Fatal Flaws of Calories In Calories Out and the Metabolism Model That Could Change Everything

Alright, let’s talk about the four most useless words in the history of weight loss advice: ‘Just eat less, move more.’ You’ve heard it, I’ve heard it, and if this phrase actually worked the way people think it does, we wouldn’t have skyrocketing rates of obesity, metabolic dysfunction, and entire industries built around yo-yo dieting. But here’s the kicker—it sounds logical. Simple math, right? Calories in, calories out. Except the human body is not a bank account; it’s a biological orchestra, and the way we process energy is more like a symphony than a spreadsheet.

We’ve already tackled the oversimplified calorie-counting dogma in our Science Dogma episode, and we’ve explored how perception alone—like believing a milkshake is ‘indulgent’—can literally alter our hormonal response. That’s not woo-woo, that’s science. But today, we’re going deeper. Because beyond the CICO model, beyond the calorie obsession, there’s a much bigger, messier, and more fascinating reality about metabolism, obesity, and why diet advice keeps failing people.

And I know what some of you might be thinking—‘But Megan, are you saying calories don’t matter?’ No. I’m saying they don’t tell the whole story. The way we eat, when we eat, why we eat, our hormones, stress levels, metabolic adaptations, even our past dieting history—all of it plays into how our body responds to food.

So as we close out Season 3 of Taste of Truth Tuesday, I want to leave you with something foundational. Not another diet trend. Not another oversimplified soundbite. But a real, nuanced conversation about what actually influences metabolism, weight loss, and why some of the most popular strategies—like keto, intermittent fasting, and calorie counting—work for some people but absolutely wreck others.

And here’s the disclaimer—I’m not an advocate for low-carb dieting in general, especially as someone who’s recovered from disordered eating. But my guest today? He eats low-carb and keto. And here’s what I respect—he’s not dogmatic about it. He understands that the real answer to health and weight loss isn’t found in any one-size-fits-all approach. It’s about bio-individuality.

So grab your coffee, take a deep breath, and get ready to rethink everything you thought you knew about metabolism. Let’s do this.


The calorie, as a unit of measurement, has a fascinating history that ties directly into the calories in, calories out (CICO) debate. While many assume the calorie has always been the standard for measuring food energy, its adoption in nutrition is relatively recent and shaped by shifts in scientific understanding, industry influence, and public health narratives.

The Origin of the Calorie

The concept of the calorie originated in physics, not nutrition. In the early 19th century, Nicolas Clément, a French chemist, introduced the term calorie as a measure of heat energy. By the late 1800s, scientists like Wilbur Olin Atwater adapted this concept to human metabolism, conducting bomb calorimeter experiments to determine how much energy food provided when burned. Atwater’s Physiological Fuel Values established the foundation for modern caloric values assigned to macronutrients (fat = 9 kcal/g, carbohydrates and protein = 4 kcal/g, alcohol = 7 kcal/g).

The Rise of Caloric Nutrition

By the early 20th century, calories became central to dietary guidelines, especially in public health efforts to address malnutrition. During both World Wars, governments used calorie counts to ration food efficiently. However, as food abundance grew, the focus shifted from ensuring sufficient calorie intake to preventing excess, paving the way for weight-focused dietary interventions.

CICO and the Simplification of Weight Loss

The calories in, calories out model became dominant in the mid-20th century, driven by research showing that weight loss or gain depended on energy balance. The First Law of Thermodynamics—energy cannot be created or destroyed, only transformed—was applied to human metabolism, reinforcing the idea that a calorie surplus leads to weight gain and a deficit to weight loss.

This framework became the foundation of mainstream diet advice, but it often overlooked complexities such as:

  • Hormonal influences (e.g., insulin, leptin, ghrelin)
  • Metabolic adaptation (how bodies adjust to calorie deficits)
  • The thermic effect of food (protein takes more energy to digest than fat or carbs)
  • Gut microbiome effects on calorie absorption
  • Psychological and behavioral aspects of eating

Criticism and the Evolution of the Debate

By the late 20th century, challenges to strict CICO thinking emerged. Researchers in endocrinology and metabolism, such as Dr. Robert Lustig and Dr. David Ludwig, highlighted that not all calories affect the body in the same way—insulin regulation, macronutrient composition, and food quality play crucial roles.

Low-carb and ketogenic diet advocates argued that carbohydrate restriction, not just calorie restriction, was key to weight management due to its impact on insulin and fat storage.

I personally think, it’s not just carbs or calories doing this. There are at least 42 factors that impact blood sugar and metabolism. This is something I’ve worked to educate my audience on for years. Carbs are just one piece of the puzzle. Stress, sleep, gut microbiome, meal timing, inflammation, hormonal balance—all of these influence the body’s metabolic “terrain.”

Where Are We Now?

Today, the calorie remains a useful measure, but the conversation has expanded beyond simple energy balance. Researchers acknowledge that while calories matter, factors like food quality, hormonal responses, and individual metabolic differences significantly impact how the body processes energy. The debate now leans toward a more nuanced view.


Now, let’s talk about why this matters.

Today, I’m joined by Adam Kosloff, an author and researcher who isn’t afraid to challenge conventional wisdom—especially when it comes to obesity and metabolism. A Substack post of his, A Righteous Assault on the Absolute Worst Idea in the History of Science, takes a sledgehammer to the dominant ‘calories in, calories out’ model, aka Move More, Eat Less? The Lie That Won’t Die, arguing that our understanding of fat storage is fundamentally broken. Instead, he presents a revolutionary new framework—the Farmer Model—that redefines how we think about metabolism, obesity, and weight loss.

For years, the dominant narrative around weight loss has been depressingly simple: “move more, eat less.” This slogan has been drilled into us by dietitians, doctors, and fitness gurus as if it were an unshakable law of physics. But if it were that simple, why has metabolic disease skyrocketed despite more people tracking their calories and increasing exercise?

Adam challenges the traditional CICO (calories in, calories out) model, not just by saying it’s wrong, but by arguing it is catastrophically misleading. His Farmer Model reframes obesity and metabolic dysfunction as a landscape issue rather than a simple calorie balance equation.

Think of your metabolism like farmland. The most obvious disruptor might be “acid rain”—high-carb, sweet, ultra-processed foods that erode the topsoil, flood the land, and cause metabolic damage (fat storage, inflammation, insulin spikes). But not all disruptions look like a storm.

Sometimes, the changes are more insidious. Maybe those daily lattes weren’t a flood but a subtle shift in the terrain, like over-fertilizing a field. Too much of a good thing, whether dairy proteins or artificial sweeteners, can nudge the metabolic landscape in a way that leads to dysfunction over time.

And here’s the kicker: It’s not just carbs or calories doing this. There are at least 42 factors that impact blood sugar and metabolism. This is something I’ve worked to educate my audience on for years. Carbs are just one piece of the puzzle. Stress, sleep, gut microbiome, meal timing, inflammation, hormonal balance—all of these influence the body’s metabolic “terrain.”

Adam’s latest Substack post, 10 Smackdowns That Lay Waste to CICO, was an absolute banger. The line “Gaze upon these arguments, ye mighty gym bros, and despair…” had me cackling. But beyond the sass, the research was rock solid. In our conversation, we break down some of the most devastating smackdowns against CICO and discuss which ones tend to make the most die-hard calorie counters short-circuit.

The takeaway? The “move more, eat less” doctrine is outdated and incomplete. It’s time for a more sophisticated conversation about metabolism that acknowledges the complexity of the human body rather than reducing it to a basic math equation.

LINKS

Science or Stagnation? The Risk of Unquestioned Paradigms – The first episode we challenged calories in, calories out (CICO) & mention Germ theory vs Terrain theory

The Farmer vs. The Banker

10 Smackdowns that lay waste to CICO

3 Times I Gained Weight on Keto

Gary Taubes Substack articles

Emotional Hijacks & Nutritional Hacks: Unveiling the🧠Amygdala’s Secrets ⁠

The Dissolution of the Nutrition Science Initiative

Obesity and Starvation Found Together

The Influence of Religious Movements on Nutrition

Why Challenging Beliefs Feels Like a Personal Attack—And Why It Shouldn’t

The Biggest Loser Study-The metabolic consequences of extreme dieting & the weight gain rebound effect

Understanding Metabolic Health: The Role of Temperature and Pulse

How to Use Temperature and Pulse for Metabolic Health Insights

In the summer of 2020, my health began to take a dive. Years of chronic dieting, over-exercising, negative self-talk, and hormonal birth control were taking their toll. I was eating next to no carbs, minimal sugar, low fat, no dairy, and only lean protein. I was working out six days a week, doing hours of cardio, and feeling terrible physically, mentally, and emotionally. Hypothyroid and adrenal symptoms began to emerge. It was clear my lifestyle was working against my physiology. My metabolism felt ‘broken’ or ‘slow,’ but in reality, I was undernourished and overstressed.

Initially, I started tracking basal temperature but did not include resting pulse rates. At the time, my average temperatures were 96.5°F, and my pulse was 44 bpm. Discovering the “pro-metabolic” community introduced me to the research of Dr. Ray Peat and Dr. Broda Barnes, and it changed my perspective.

According to Dr. Raymond Peat, a well-nourished, healthy human should have a resting pulse of 85+ beats per minute. A high resting pulse (in the absence of stress) indicates good metabolic health and a strong ability to repair. This counters mainstream advice, which often celebrates a low resting heart rate as a marker of fitness.

Why Temps and Pulses Matter

Your thyroid acts as your body’s thermostat, controlling metabolism. Metabolism is the sum of all biochemical reactions in the body—essentially, the rate of energy production in the cells and the speed of bodily processes. Body temperature reflects metabolic activity, and people with underperforming thyroids often have low basal body temperatures.

Tracking basal body temperature and resting pulse provides insights into your thyroid and metabolic function:

  • Basal body temperature can indicate if ovulation has occurred, reflecting progesterone production (a pro-thyroid hormone).
  • Resting pulse shows how well your body is utilizing nutrients and oxygen.
  • Tracking post-meal temperatures and pulses helps identify stress responses and metabolic efficiency.

How to Track Temps and Pulses

To get accurate and actionable insights, follow these steps: Log your readings daily to identify trends over time. Note factors like stress, sleep, meals, and menstrual cycle phases that might influence your results.

  • Choose the Right Thermometer
    • Use a digital thermometer with a quick response time and high accuracy.
    • Glass basal thermometers are also effective but require more time to measure.
  • Measuring Basal Temperature
    • Take your temperature first thing in the morning, immediately after waking, and before getting out of bed.
    • Place the thermometer under your tongue for the most reliable reading. Avoid using armpit readings as they can be less accurate due to environmental factors.
  • Measuring Resting Pulse
    • Use a wearable device, like a fitness tracker, to measure your resting pulse overnight or immediately upon waking.
    • Alternatively, place your index and middle fingers on your wrist or neck to manually count beats for 60 seconds.
  • After Meals
    • Check your temperature and pulse 30-40 minutes after breakfast. These should gently rise after eating, as food lowers stress and generates heat. If they drop, it may indicate elevated stress hormones upon waking.
  • Track Afternoon Readings
    • Record your temperature and pulse between 1-3 p.m. when your body’s temperature should naturally peak.
  • Use a Tracking App or Journal

Questioning the Mainstream Narrative

The Mayo Clinic states: “Generally, a lower heart rate at rest implies more efficient heart function and better cardiovascular fitness. For example, a well-trained athlete might have a normal resting heart rate closer to 40 beats per minute.”

But is a low resting heart rate truly beneficial? Evidence suggests otherwise. Thyroid health—the thermostat of the body—plays a crucial role in metabolism. A sluggish thyroid often correlates with lower body temperatures and slower heart rates, indicators of reduced metabolic function.

Why Temperature and Pulse Matter

Metabolism refers to the sum of all biochemical reactions in the body. It’s essentially the rate of energy production at the cellular level—the speed at which your body processes and utilizes energy. Your body temperature is a reflection of this activity. People with under-functioning thyroids tend to exhibit low basal body temperatures and slower pulses, which can indicate:

  • Low thyroid function
  • Inflammation
  • Suppressed immune function
  • High stress
  • Estrogen dominance

In contrast, a warm body is linked to better immune function, efficient digestion, reduced inflammation, and overall metabolic health.

How to Track Temperature and Pulse

Tracking these metrics throughout the day provides invaluable insights into your metabolic health:

  • Upon Waking:
    • Follicular Phase: 97.2-97.8°F
    • Luteal Phase: 98.6°F
    • Resting pulse: 75-90 bpm
  • After Breakfast:
    • Temperatures and pulse should gently rise after meals. Food lowers stress and generates heat. If your numbers drop, it may indicate falsely elevated waking temps due to stress hormones like cortisol.
  • Afternoon:
    • Temperatures should peak between 1-3 PM.

What Your Numbers Reveal

  • Higher temp and pulse (in the absence of stress): Optimal metabolic function
  • Normal temp and higher pulse: Active stress response
  • Lower temp and lower pulse: Chronic stress and metabolic suppression
  • Normal temp and lower pulse: Chronic stress or low thyroid function

How to Optimize Your Numbers

If your temperature and pulse rates aren’t within optimal ranges, consider the following steps:

  1. Prioritize bioavailable protein: Aim for at least 100 grams per day.
  2. Eat enough calories: 1,800-2,000+ per day, depending on individual needs.
  3. Include digestible carbs: At least 150 grams daily (e.g., honey, maple syrup, fruit, root vegetables).
  4. Pair carbs with protein: Avoid “naked carbs” to stabilize blood sugar.
  5. Focus on anabolic exercise: Build muscle with strength training to boost metabolism.

Why This Matters

Using temperature and pulse as tools, you can:

  • Monitor how well your body utilizes energy.
  • Evaluate recovery from exercise.
  • Gain insights into hormonal balance (e.g., progesterone production and ovulation).
  • Identify the impacts of stress on your physiology.

Final Thoughts

Key Takeaways By regularly monitoring your temps and pulses, you can uncover patterns and make adjustments to optimize your thyroid and metabolic health. These small, daily practices provide powerful insights into how your body is functioning and what it needs to thrive.

Healing is never a final destination; it’s an ongoing journey. Over time, I’ve seen significant improvements in my metabolic markers. My overall body temperature has risen to 97.6–98.1°F, and my resting pulse is now around 70 bpm—much better than where I started. This progress has required me to embrace a larger body size than what traditional “fit fam” culture promotes, but it has been worth it. Prioritizing healing and hormone rebalancing has provided my body with the sense of safety and stability it needed to thrive.

To read more about the doctor that pioneered these tests grab the book called Hypothyroidism: The unsuspected illness by Dr. Broda Barnes

✌🏼Looking for more support navigating your cycle with fitness & nutrition? Check out my FREE guide & pro-metabolic strength training guide available for purchase!

LINK to apply for 1:1 coaching ❤️

Sources 👇🏻

PMID: 28740582
PMID: 26792255
Dr. Ray Peat