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Expert
Stacy Sims

Stacy Sims

Exercise Physiologist, Women's Performance Specialist

PhD Exercise Physiology

Women are not small men — train and fuel by menstrual cycle phase, not generic protocols, and performance gaps close fast.

Women's PhysiologyTrainingMenstrual CyclePerformance Nutrition

Controversy Notes

Some claims (e.g. fasted training in women) debated by other researchers.

Episodes

79 episodes
Why Perimenopausal Women Are Losing Power (And the Lifting Protocol That Fixes It)

Why Perimenopausal Women Are Losing Power (And the Lifting Protocol That Fixes It)

May 20 (1mo ago)

It's because we're losing power. If we're doing our our strength training in the traditional sense where we're doing our our higher reps, we're going to build some lean mass, but we're not addressing the power end.

perimenopause-power-lossheavy-strength-trainingmyosin-actin-contractile-proteinsestrogen-and-muscle-functioncentral-nervous-system-adaptation
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Why Active Women Should Break Their Fast at Breakfast (Not Noon)

Why Active Women Should Break Their Fast at Breakfast (Not Noon)

May 18 (1mo ago)

There's over 50% of recreationally active women because of diet trends and and other conversations that they're actually in low energy availability.

low-energy-availabilitycircadian-rhythm-fastingintermittent-fasting-critiquefemale-endocrine-functionthyroid-downregulation
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Can Heavy Lifting Help Prevent Dementia and Alzheimer’s?

Can Heavy Lifting Help Prevent Dementia and Alzheimer’s?

May 13 (2mo ago)

Lactate is preferred fuel for the brain. It's not a waste product that we used to think about in the '90s.

alzheimers-dementialactate-brain-fuelstrength-training-neural-plasticityapoe4-geneepigenetics
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Should Women Eat Before Morning Exercise? Cortisol Spike Explained

Should Women Eat Before Morning Exercise? Cortisol Spike Explained

May 11 (2mo ago)

I'm more sensitive to glucose because I've been sleeping all night and I need it. My insulin resistance isn't as high as it is in the afternoon. So, let's have some carbohydrate. Let's have a little bit of protein. Let's

cortisol-awakening-responsemorning-appetite-hormonesghrelin-peptide-yymuscle-catabolism-fastingnight-hypoglycemia-sleep
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How Women Should Hydrate in Training: Sweat Rate, Sodium, Menstrual Cycle, and Perimenopause

How Women Should Hydrate in Training: Sweat Rate, Sodium, Menstrual Cycle, and Perimenopause

May 9 (2mo ago)

People are killing the thirst stimulus. As soon as you put water in your tongue, you kill the thirst stimulus so your body actually never really gets hydrated.

hydration-mythsgatorade-historysports-drink-carbohydrate-vs-hydrationwomen-sex-differences-hydrationmenstrual-cycle-hyponatremia
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Why HIIT and Sprint Intervals Are the Best Medicine for Perimenopausal Women

Why HIIT and Sprint Intervals Are the Best Medicine for Perimenopausal Women

Apr 29 (2mo ago)

When we talk about training stress loads that highintensity interval training is a pretty strong stress on the body and sprint interval training is as well. They are really effective at reducing visceral fat and helping

hiitsprint-interval-traininginsulin-sensitivityglute4-proteinsvascular-compliance
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Creatine for Women: The Daily Dose for Muscle, Brain Health, and High-Intensity Training

Creatine for Women: The Daily Dose for Muscle, Brain Health, and High-Intensity Training

Apr 27 (2mo ago)

It's like let's load 5 g four times a day and really get the swole. No one wants that unless you're in the bodybuilding set.

creatinebrain-healthhigh-intensity-trainingsupplementationatp-cp-cycle
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Creatine for Women Over 40: Benefits for Muscle, Brain, Bone and Gut + How Much to Take

Creatine for Women Over 40: Benefits for Muscle, Brain, Bone and Gut + How Much to Take

Apr 22 (2mo ago)

women have 70 to 80% of the stores that men have

creatinewomen-over-40muscle-strengthbrain-healthbone-health
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Heavy Lifting for Women Over 40: Why 3-5 Reps Beats 8-12 for Strength, Brain, and Longevity

Heavy Lifting for Women Over 40: Why 3-5 Reps Beats 8-12 for Strength, Brain, and Longevity

Apr 20 (2mo ago)

It takes a lot to build muscle. Takes a lot.

strength-trainingwomen-over-40power-trainingestrogenmyosin
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How Heavy Lifting Protects the Female Brain in Menopause (The Lactate Connection)

How Heavy Lifting Protects the Female Brain in Menopause (The Lactate Connection)

Apr 18 (2mo ago)

human body's not an algorithm.

menopausal-weight-gaincalories-in-calories-outlean-mass-vs-fat-lossheavy-liftinglactate-brain-fuel
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Why Walking and Running Are NOT Enough to Protect Women's Bones in Perimenopause

Why Walking and Running Are NOT Enough to Protect Women's Bones in Perimenopause

Apr 15 (3mo ago)

three body weights is sort of that threshold where the bone then switches on.

bone-densitymenopause-hormone-therapyimpact-exerciseperimenopause-bone-lossresistance-training
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You’re Not Doing HIIT And That’s Why It’s Not Working

You’re Not Doing HIIT And That’s Why It’s Not Working

Apr 11 (3mo ago)

It's not just hormones. Everyone kind of puts that in that box, but we see sex differences from birth.

sex-differencesmuscle-fiber-typesmenstrual-cycleanovulatory-cyclesperiodization
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How Fiber and Gut Microbiome Diversity Affect Bone Health in Perimenopausal Women

How Fiber and Gut Microbiome Diversity Affect Bone Health in Perimenopausal Women

Apr 8 (3mo ago)

The very first thing we can start with is our gut microbiome. How do we take care of that? Because it that feeds forward to feeling better, having better body composition.

gut-microbiomeperimenopausebone-healthsarcopeniafiber
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Is It Too Late to Build Bone Density After Menopause? Resistance Training and Impact Exercise

Is It Too Late to Build Bone Density After Menopause? Resistance Training and Impact Exercise

Apr 6 (3mo ago)

the total amount of the billions of dollars NIH spent on research, only 1% was done on all women's health research.

bone-healthmenopauseperimenopauseosteopeniaosteoporosis
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Why Collagen Is NOT a Protein (And What Women Actually Need for Bone Health)

Why Collagen Is NOT a Protein (And What Women Actually Need for Bone Health)

Apr 4 (3mo ago)

When you go buy a collagen supplement, I get frustrated with the marketing saying it's a protein. It's a structural protein, it's not a dietary protein, so people use it as if it's a muscle-building protein.

collagenprotein-marketingsupplementsbone-healthjoint-health
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How to Build Bone Density After 40: Resistance Training, HRT, and Creatine

How to Build Bone Density After 40: Resistance Training, HRT, and Creatine

Apr 2 (3mo ago)

I'm not huge on calories or macros. I care about women being strong, having strong bones, and taking up space.

bone-densityresistance-trainingplyometricsmenopause-hormone-therapymicrobiome
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Why Your Work Schedule Was Built for a Man (And What Women Actually Need)

Why Your Work Schedule Was Built for a Man (And What Women Actually Need)

Apr 1 (3mo ago)

I think every woman wants to do a really good job, and she is going to front-load those tasks on a time that she feels better, and offload in a time where she's not feeling as well. But she's going to get it done, for su

menstrual-leavecycle-synced-workworkplace-flexibilityon-site-childcarehormonal-cycle-productivity
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Why Women Are Wasting Money on Peptides When the Fix Is Free

Why Women Are Wasting Money on Peptides When the Fix Is Free

Mar 30 (3mo ago)

Save your money cuz they're very expensive.

peptidesbpc-157womens-healthmenopausesoft-tissue-injuries
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The Eating Window That Actually Works for Women Over 40 (It's Not What You Think)

The Eating Window That Actually Works for Women Over 40 (It's Not What You Think)

Mar 28 (3mo ago)

Women should not do any kind of fasted training.

fasted-trainingtime-restricted-eatingcircadian-rhythm-sex-differencesmeal-frequency-womenpre-workout-nutrition
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Why Women Were Taught to Be Proud of Losing Their Period (And How It's Destroying Female Athletes)

Why Women Were Taught to Be Proud of Losing Their Period (And How It's Destroying Female Athletes)

Mar 26 (3mo ago)

Women would walk into that professional sports space and be excited if they were amenorrheic or didn't have periods. Or they trained hard enough and their period went away because then they were more like men and they co

menstrual-cycletraining-intensity10-minute-ruleamenorrheafemale-athletes
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