Dr. Stacy Sims on Perimenopause: What the Viral Advice Gets Right, and What Could Be Noise

Dr. Shweta Patel, MD, FACOG

Board-certified OB/GYN • U.S. Navy veteran (13 years) • Author, The Book of Hormones • Founder, Gaya Wellness

Published July 20, 2026 • 10-minute read

A carousel landed in my feed the other week, the kind that racks up 16,000 likes and 2,800 comments. The header: “Dr. Stacy Sims just dropped a…” Eleven slides of confident, punchy claims about how women in perimenopause should eat, train, and supplement. My patients started forwarding it to me within days.

Here is the thing. Dr. Stacy Sims is a serious exercise physiologist, and her core message, that women are not small men, and that most of exercise science was built on male subjects and then handed to women as if biology were a rounding error, is one I agree with completely. It is the same fight I have been having with the medical system for years.

But there is a difference between what a researcher publishes and what an Instagram account compresses her work into for engagement. The version making the rounds flattens good science into an eleven-point rulebook, and in that compression the nuance dies. A few of these claims are excellent. A few are half-right. And two or three are the fitness equivalent of vending-machine medicine, confident, viral, and wrong in ways that could hurt you.

So let me do what I do in my practice. Let me go through the claims one by one, tell you what holds up, and tell you what doesn’t.

Start With What’s Right: Women Are Not Small Men

Let me be clear about where the science is on her side, because it is the most important part. The foundational claim, that decades of exercise and nutrition research were done on men and extrapolated onto women, is true and consequential. So is the second: perimenopause is a distinct inflection point, not a gentle slope.

The study the viral posts lean on is worth naming. In 2022, researchers at the University of North Carolina (Gould and colleagues, in Menopause) evaluated 72 women ages 35 to 60 with a four-compartment body-composition model, and found perimenopausal women already carried a more central fat distribution and higher body fat than premenopausal women despite similar diet and activity. Their conclusion was blunt: perimenopause may be the most opportune window for lifestyle intervention. The landmark SWAN data agrees: fat gain roughly doubles and lean mass declines in the two years around the final period, even when calories and activity don’t change.

So the headline is correct: perimenopause is where the metabolic story turns, and your mid-30s to mid-40s is the time to act. Your body changed; your approach needs to change with it. On that, Dr. Sims and I fully agree. It’s the specifics where the internet version wobbles.

Fuel and Fasted Training: Right Idea, Oversold Numbers

Three of the claims center on food and timing, and this is where the carousel is directionally smart but numerically shaky.

Claim: Fasting “destroys hormones” in as little as four days. The kernel is a real concept, low energy availability. Loucks and Thuma showed, in a 2003 study in the Journal of Clinical Endocrinology & Metabolism, that when energy availability drops below about 30 kcal per kilogram of lean mass per day, luteinizing hormone and thyroid (T3) measurably shift, a real reason chronic under-fueling hurts women. But the “four days” drama comes from young, regularly cycling subjects, and a 2006 follow-up found the effect fades with gynecological age, so the women this advice targets show the least dramatic version. The practical lesson survives, don’t train chronically underfed, but the timeline is cranked up for the algorithm.

Claim: Fasted training burns lean muscle, not fat. A reasonable takeaway wrapped in oversimplified physiology. Your body doesn’t reach for muscle “first” the moment blood sugar dips; fuel use is graded and individual. But the underlying advice holds: many women train and recover better with a little fuel beforehand, and grinding through hard sessions chronically depleted raises stress and blunts recovery. A little protein or carbohydrate before a demanding workout is a cheap, sensible habit, just not a law of metabolism.

Claim: Women have a strict 45-minute post-training protein window; men have hours. Here the protein-forward instinct is right and the timing rule is oversold, so let me give you the actual hierarchy. Priority one, and it is not close: hit enough total protein in a day. Muscle gets more resistant to protein’s building signal with age, so perimenopausal and postmenopausal women genuinely need more of it, and more per meal, than they did at 30. A target near one gram per pound of goal body weight, spread across your meals, is what moves the needle. Get that consistently and you have done 90% of the job. Priority two, only once priority one is handled: yes, then timing becomes a worthwhile way to level up, nudging some of that protein around training to optimize how your body uses it. But a rigid, women-only 45-minute window is not established science, and the broader literature has largely retired the narrow “anabolic window” framing. Do not let stopwatch anxiety distract you from the number that actually matters.

Intensity and Load: This Part Largely Holds Up

Two claims deal with how women should actually train in midlife, and here the carousel is on its firmest ground.

Claim: Don’t live in the moderate middle: go truly hard or truly easy. Dr. Sims calls this polarized training, and the logic is reasonable: chronic moderate work can keep stress hormones elevated without the potent adaptation of genuinely hard efforts or the recovery of genuinely easy movement. For a woman already contending with shifting mood, disrupted sleep, and a body more prone to storing visceral fat, living in a grinding gray zone is a poor trade. I’d soften the absolute, moderate cardio is not “the worst possible zone,” but the core prescription, brief real intensity paired with true easy recovery, is well supported.

Here is the hierarchy, because context is everything. If you are going from the couch to just starting out: do YOU. Walk, move, show up. Something beats nothing every single time, and no one should feel guilty about where they begin. But if you are already logging long, prolonged cardio, and you know who you are, my Disney marathon girlies, and you are staring at the scale wondering why it will not move, or if you still believe that losing weight requires hours of steady-state cardio because that is what they sold us for decades alongside a food pyramid that was flat wrong, then consider this your sign. You are allowed to trade some of those miles for heavy lifting and short, true intensity, and you are allowed to do it with zero guilt. More time on your feet is not the lever you were promised it was.

Claim: From your mid-30s, lifting heavier matters more than lifting more. This one is correct, and it’s the single most useful thing in the entire carousel. As estrogen’s support for muscle recovery wanes, higher-load, lower-rep resistance training, real compound movements like squats, deadlifts, presses, and rows, becomes the more efficient stimulus for the strength, power, and bone protection women need heading into their 60s, 70s, and 80s. The menopause resistance-training evidence is consistent on this: challenging loads protect lean mass and bone density in a way that light weights and endless reps do not. If you take one thing from Dr. Sims’s work, take this: lift heavy, with good form, and progress the load.

Where the Carousel Outruns the Evidence

Now the part where I have to put my physician hat on, because three of these slides make claims that range from “overstated” to “please don’t do this without asking someone.”

Claim: Creatine beats SSRIs, and creatine hair loss is really progesterone. Creatine monohydrate at 3 to 5 grams a day is one of the safer, better-studied supplements a woman can take, and I recommend it. My quarrel is the framing. The mood trial everyone cites, Lyoo et al. in the American Journal of Psychiatry, 2012, added creatine to an antidepressant and beat antidepressant-plus-placebo. It did not replace medication and win. Reading it as “creatine instead of your SSRI” is a dangerous misread. On hair: the fear traces to one 2009 study in male rugby players that measured a DHT rise but never measured hair, and a 2025 randomized trial that did measure hair found no effect. Calling midlife thinning “progesterone-driven” is simply wrong; it’s mostly the shifting estrogen-to-androgen ratio as estrogen falls, and can reflect thyroid, iron, or stress. That deserves a workup, not a slogan.

Claim: A post-training sauna at 185 to 210°F expands blood volume, and don’t rehydrate. The science is real but thin. The plasma-volume finding comes from Scoon et al. (Journal of Science and Medicine in Sport, 2007), a crossover in exactly six male runners, in whom three weeks of post-exercise sauna raised plasma volume about 7%. Heat may also, over time, ease hot flashes and night sweats. But extrapolating a six-man protocol into universal advice is a leap, and deliberately not rehydrating is where I draw the line: prolonged heat plus intentional dehydration is a real risk for anyone with cardiovascular concerns, on medications, or prone to lightheadedness, which is a lot of perimenopausal women. Sauna if you enjoy it and you’re cleared for it. Drink the water.

Claim: High-intensity training protects women’s brains from Alzheimer’s. I want this true, and there is a real association. A 2022 meta-analysis in the British Journal of Sports Medicine linked physical activity to lower dementia and Alzheimer’s risk. But association is not prevention: a 2020 Mendelian randomization analysis in Neurology, built to test causation, did not support that exercise lowers Alzheimer’s risk. The “lactate fuels the brain, so sprints prevent Alzheimer’s” chain is a plausible hypothesis, not settled fact. Train hard for your brain, the downside is low, but a prevention promise is a claim the evidence can’t yet cash.

The Real Power Window Is Hormonal, Not Just Athletic

The carousel is right that perimenopause can start at 35 and your body will often tell you before a doctor does. The signals it lists are legitimate early markers I take seriously: training that stops producing results despite the effort; body composition changing with no change in diet or exercise; fragmented sleep; new frozen shoulder or plantar fasciitis, both associated with estrogen fluctuation. Men age in a relatively linear line. Women hit an inflection point where multiple systems shift at once, because nearly every one responds to estrogen. That part is exactly right, and more women need to hear it before their forties, not after.

But look at the “right response” the viral version prescribes: lift heavier, swap moderate cardio for sprints, push protein higher. Every one of those is good advice. And every one of them is a training answer to what is fundamentally a hormonal event.

This is the blind spot of the entire fitness-influencer framing: it treats perimenopause as a problem you can deadlift your way out of. Sometimes, for some women, better training and protein really are enough. But heavy lifting does not measure your estradiol. Sprint intervals do not check your thyroid, your iron, or your fasting insulin. A protein target does not tell you whether you’re a candidate for hormone therapy, the intervention with the strongest evidence for protecting the very bone, brain, and cardiovascular systems this advice keeps invoking.

You Didn’t Fail. Your Body Did.

Let me say the part everyone tiptoes around. Perimenopause is not a mindset problem, and it is not a discipline problem. It is a hormone deficiency: a measurable, physiological decline in estrogen and progesterone that touches nearly every system you have. And we do not treat deficiencies with vibes and macros.

We don’t tell a woman with hypothyroidism to journal her way to a normal TSH. We don’t hand someone whose pancreas is failing a meal plan instead of the hormone their body stopped making. We don’t tell a person with clinical depression to think positive and skip the medication that corrects the chemistry. We replace what’s missing. We correct the deficiency. Then they go live their lives. Perimenopause is no different, and it is long past time we stopped pretending it is.

So when the wellness internet answers a hormonal decline with heavier deadlifts, more protein, cold plunges, and a tighter morning routine, be clear about what is happening. You are being handed an elaborate set of workarounds to help you tolerate a deficiency instead of treating it. And every time it’s framed that way, it quietly reinforces the idea that needing treatment is some kind of personal failure.

It isn’t. You did not fail. Your body did. Your ovaries are winding down on a biological schedule you did not choose and cannot out-train, and I’m sorry, but that’s the reality, the same way a thyroid or a pancreas can stop doing its job. There is no medal for white-knuckling through it unmedicated.

So here is what I actually tell my patients. Get evaluated properly, because that is medicine and not a vending machine, and once we know your labs and your history, if you’re a candidate, start the hormone therapy. Correct the deficiency. For most women in this window, the answer was never another macro spreadsheet; it is replacing what the body stopped making, and then getting on with your life. The lifting and the protein are excellent. They are support. They were never the treatment.

The power window is real. But it is not only a window to train harder. It is a window to find out, with actual data, what your hormones are doing, and to treat it, while intervention still does the most good.

What I Actually Do Before I Hand Anyone a Plan

When a woman comes to me recognizing herself in that list of signals, I don’t start with a workout. I start with the questions an Instagram carousel structurally cannot answer.

Inside Hormonal Agency™, I evaluate the whole woman before anyone prescribes anything, hormones, training, or otherwise:

• The hormonal panel. Estradiol, progesterone, testosterone, plus thyroid, and the metabolic markers like fasting insulin and lipids that tell me what’s actually driving the symptoms, not what an algorithm assumes.
• The clinical picture. Cycle pattern, sleep, mood, symptom timeline, family history, and risk factors, read together. Two women with identical lab numbers can need completely different plans.
• The decision that follows the data. For some women, the honest answer is reassurance, better protein, and heavier lifting, and I’ll say so. For others, it’s bioidentical hormone therapy alongside the training. The point is that the plan follows the evidence about your body.

This is the difference between a rulebook and medicine. A carousel gives every woman the same eleven slides. Your endocrine system did not read them, and it deserves to be measured, not guessed at. That’s the whole idea behind Hormonal Agency™: physician-led perimenopause and menopause care that starts with your data.

You Haven’t Failed. And You Can’t Out-Train What Nobody Measured.

If you’ve been doing the work of lifting, fueling, and showing up, and your body still isn’t responding: you haven’t failed, and you’re not doing it wrong. Your body changed the rules, and most of the advice you were handed never accounted for it. Dr. Stacy Sims did women a real service by insisting we stop training them like small men; the internet did women a disservice by flattening that into an eleven-slide rulebook that ranges from excellent to genuinely risky. Take the good parts, lift heavy, fuel your training, get enough protein, and leave the sauna-without-water and swap-your-SSRI parts on the app where they belong.

Then go find out what your hormones are actually doing, and treat what you find. That’s the one thing no workout, and no carousel, can do for you.

The TL;DR

Dr. Shweta Patel, MD, FACOG

Board-certified OB/GYN, U.S. Navy veteran, and founder of Gaya Wellness. Dr. Patel leads physician-managed programs in medical weight loss, hormone optimization, and longevity medicine for women in midlife and beyond.