Why the Protein Standard for Women Was Never Built on Women
Dr. Stacy Sims and Dr. Vonda Wright unpack why so much of exercise and nutrition guidance for women was built on male data — including the protein RDA. Their alternative is muscle-centric: lift with purpose, fuel for the task, and track how you actually feel instead of what the scale says.
Overview
Exercise physiologist Dr. Stacy Sims joins orthopedic surgeon Dr. Vonda Wright for a wide-ranging conversation on why women have been handed guidance that was never tested on them. Sims describes how sports science still works from tiny study samples and male-derived thresholds, and how wearable algorithms can flag normal cycle-related shifts in resting heart rate, temperature and HRV as poor recovery.
Her counter-move is individual: teach women to read their own signals again through a short, repeated check-in, and build training around trends rather than a single day's score. On fueling, she frames food as energy for the task at hand, uses an 80/20 rule instead of cheat days, and asks for fiber and protein at every eating opportunity. The protein discussion traces the RDA back to its origins and contrasts it with newer work pointing to roughly 1.6–1.8 g per kilogram, with a meaningful per-meal threshold.
She also explains why branched-chain amino acids can't stand in for whole protein, and why collagen isn't the protein people think it is. The training blueprint is smaller than most expect: two to three focused lifting sessions, a couple of genuinely polarized interval sessions, and unhurried time outdoors. For those starting later, she phases in isometrics and tendon loading long before heavy work. The closing note is the through-line: body composition, not body weight, is the number worth caring about.
Key quotes
5It's not about the running and the cardio and eating less and trying to fit into this certain dress. It's about let's be muscle centric.
The algorithms are still based on male data.
I want every woman who exercises on purpose to know that she's an athlete, because athletes have a plan and they fuel for what they were doing.
The RDA is the minimum amount you need to prevent malnutrition.
Weight on a scale — what does that mean? It differs day to day. What I'm concerned about is body composition.
Key ideas
9Muscle-centric is bigger than aesthetics
Sims argues that lifting isn't about building visible size but about brain, bone, cardiovascular and metabolic function. She connects purposeful strength work to how women age, and frames it as a push-back against a narrow cultural template.
The evidence base was never built on women
Prescriptions built on VO2 or lactate thresholds miss the mark because women can work at a higher percentage and stay aerobic. Studies with a dozen participants get treated as a norm, when the real picture is enormous individual variation.
Wearable algorithms misread normal physiology
After ovulation, progesterone raises temperature and resting heart rate and lowers heart rate variability. A dashboard reads that as under-recovered or getting sick, when it is simply a normal cyclical shift that was never encoded.
Pooled data could give women real baselines
Sims and Wright imagine de-identified data pooled across teams in a single sport, building millions of data points. That would finally establish what normal looks like pre-season, in-season and post-season — so a deviation actually means something.
The ten-minute wellness meeting
Three mornings a week, before screens and noise, sit with a drink and write down how you feel. Score physical and mental separately from one to ten, so you can tell exertion-driven tiredness apart from mental depletion.
Fuel is energy, not a moral ledger
Sims frames food as energy for the task at hand, front-loaded across the day so the body can repair at night. She keeps an 80/20 rule and rejects cheat-day language entirely — nothing is off limits, most days are simply better choices.
Where the protein number came from
The RDA was set as the minimum to prevent malnutrition, drawn from methods and populations that never represented active women. Newer work in recreational female athletes points to at least 1.6–1.8 g per kilogram to support endocrine function, muscle and recovery.
Leucine needs the rest of the protein
Adding branched-chain amino acids on their own doesn't reproduce whole protein: the other amino acids matter for how they're used. Collagen is structural rather than dietary protein, and pea protein carries roughly 6% leucine versus 10–12% in dairy whey or animal sources.
Strength and power are different jobs
Strength work taxes the nervous system with heavy loads, low reps and long recoveries — five by five around 80%, three minutes between sets. Power lightens the load to about 68–70% and moves the bar fast, or contrasts a heavy set straight into jumps.
Practical takeaways
7- 1
Book a ten-minute meeting with yourself 23:30
Three mornings a week, before the day starts, write down how you feel and rate physical and mental state separately from one to ten. Keep it long enough to see trends rather than single days.
- 2
Keep the appointment, change the session 29:00
If you show up and the numbers stay low after a warm-up, make it a mobility or recovery day rather than skipping. The habit stays intact and the guilt has nowhere to land.
- 3
Fiber and protein at every eating opportunity 34:00
Sims works food-first and uses supplements when access to real food breaks down. She keeps 80% of the week deliberate and leaves 20% for dinners out and holidays.
- 4
Think per meal, not just per day 41:00
Research she cites points to a meaningful per-meal threshold around 35–40 grams for older women, alongside a daily target of roughly 1.6–1.8 g per kilogram. Spreading protein across meals matters as much as the total.
- 5
A realistic training week is smaller than you think 46:30
Two to three focused lifting sessions and a couple of genuinely polarized interval sessions cover the bases. Outdoor time — walking, swimming, playing with kids — counts as recovery, not as another workout.
- 6
Take the full rest between heavy sets 50:00
Three minutes or more between heavy sets lets the nervous system reset, which is the whole point of the adaptation. Both speakers report noticeably better following sets when they stop rushing.
- 7
Starting later means a longer on-ramp 51:40
For someone beginning in their sixties, Sims phases in isometrics, mobility and body-weight work first to load tendons and ligaments and build motor patterns. Load comes later — and a study she cites found novices aged 60–80 matched 20–30 year olds in early neural response.
Topics & chapters
15Two women who changed each other's minds
Wright describes how Sims' first book pushed her back into heavy lifting. They set up the theme: strength as capacity, not as appearance.
What drives the work
Sims names two motivations — the cultural box women are squeezed into, and the generation of girls coming up behind her daughter. Muscle-centric training is her push-back.
Fifty-four years in, the research is still uneven
Coaches still prescribe from male-derived thresholds, and studies of a dozen women get treated as representative. Sims argues for the individual in context instead.
Why your wearable gets the cycle wrong
Post-ovulation shifts in temperature, resting heart rate and HRV look like poor recovery to an algorithm. The physiology is normal; the interpretation layer isn't.
The pooled-data thought experiment
Wright borrows the multi-institutional model from medicine and imagines it applied to a whole league. Real baselines would turn today's guesswork into a red flag that means something.
The ten-minute wellness meeting
A short, screen-free morning check-in three times a week, with separate physical and mental ratings. It's the entry point for everything else she prescribes.
Consistency without guilt
Show up, then decide what the session should be. Deload weeks and family holidays are planned permission, not failure.
Fueling as energy, and the 80/20 rule
Food supports the task at hand, weighted earlier in the day. Cheat-day language gets dropped entirely.
Food first, then supplements
Fiber and protein at every eating opportunity, with protein powder as a fallback when food isn't available. Creatine, vitamin D3 and magnesium come up as the shortlist.
The protein conversation, properly
Where the RDA came from, what newer work in active women suggests, and why anabolic resistance changes the calculation with age.
Leucine, BCAAs and collagen
Why isolated branched-chain amino acids don't substitute for whole protein, and how leucine content differs between plant and animal sources.
Designing a week at 42
Two to three lifting sessions, a couple of true intervals, and time outdoors that Sims calls soul food.
Strength versus power
Five by five at around 80% with three-minute rests for strength; lighter, faster bar speed or contrast work for power.
Starting at 62, and why tendons take longer
A longer on-ramp of isometrics and mobility, and a frank comparison of muscle versus tendon recovery timelines.
Body composition over body weight
A conference report where over half of women named weight as their top concern becomes the closing argument for a different measure entirely.