The Real Reason You Wake Up at 3AM: Female Circadian Rhythm Explained

Most women are told to rest 3 minutes between heavy sets but Dr. Stacy Sims explains why that's actually working against you. Because women have a longer time-to-fatigue within a set, waiting the full recovery window means losing joint readiness and warmth, making it harder to progress your load. The fix: cut rest to roughly 2 minutes to keep your strength training progressive, not stalled. 📩 Join my newsletter for updates, tips, and free resources 👉 https://www.drstacysims.com/generic_o... Want to go deeper? Start here: Menopause 2.0 Your complete science-based guide to training through midlife and beyond 👉 https://www.drstacysims.com/menopause... Microlearning Courses Focused courses on supplements, hormones, and training - each under 3 hours 👉 https://www.drstacysims.com/microlear... Next Gen: Training Active Girls For coaches, parents & teachers helping girls thrive through puberty and sport 👉 https://www.drstacysims.com/nextgen?u... Not sure where to start. Start here: 👉 https://www.drstacysims.com/product_g... ▶️ Watch Next: Continue learning with these related videos: The Truth About Women’s Training & Nutrition | Dr. Stacy Sims on Andrew Huberman Podcast    • The Truth About Women’s Training & Nutriti...   Is Mainstream Exercise Advice Sexist? Here’s the Truth! | Dr. Stacy Sims on Diary of a CEO    • Is Mainstream Exercise Advice Sexist? Here...   Why Women Need a Different Approach to Nutrition & Training | Dr Stacy Sims on The Proof    • Why Women Need a Different Approach to Nut...   👩‍🔬 About Me: I’m Dr. Stacy Sims, exercise physiologist, nutrition scientist, and author of ROAR and Next Level. My mission is simple: stop training women like small men. I help you understand and work with your physiology - for better performance, health, and longevity. Follow me for daily tips: Instagram: @drstacysims Facebook: @drstacysims LinkedIn: Dr. Stacy Sims 🔔 Subscribe for new videos on women's health, training, and recovery 👍 Like, share, and drop a comment - I love hearing your questions #DrStacySims #WomenAreNotSmallMen #WomensHealth #FemaleAthletes #ExerciseScience #Hormones #StrengthTraining #MenopauseFitness

The 1-Hour Weekly Workout for Perimenopausal Women: 20/20/20 Protocol Explained
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The 1-Hour Weekly Workout for Perimenopausal Women: 20/20/20 Protocol Explained

Dr. Stacy Sims: Jump Training, Brain Lactate, & Female Protein Needs.
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Dr. Stacy Sims: Jump Training, Brain Lactate, & Female Protein Needs.

The Science of Meal Timing in Women | Hormones, Metabolism & Performance
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The Science of Meal Timing in Women | Hormones, Metabolism & Performance

Stacy Sims:  The 3 Supplements Women Actually Need
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Stacy Sims: The 3 Supplements Women Actually Need

Real Confidence Comes From This, Not What You Think | Eileen Gu
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Real Confidence Comes From This, Not What You Think | Eileen Gu

Scientists Discovered the Best Type of Exercise for Burning Visceral Fat (this is it)
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Scientists Discovered the Best Type of Exercise for Burning Visceral Fat (this is it)

Perimenopause training explained: The 3 workouts women need for strength & metabolism
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Perimenopause training explained: The 3 workouts women need for strength & metabolism

THIS Is How You Actually Lose Dangerous Visceral Fat
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THIS Is How You Actually Lose Dangerous Visceral Fat

How To Flirt Effortlessly in Everyday Life
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How To Flirt Effortlessly in Everyday Life

If You’re Always Stiff, Your Body Is Missing This
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If You’re Always Stiff, Your Body Is Missing This

The SHOCKING Truth About Gluten Nobody Tells You
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The SHOCKING Truth About Gluten Nobody Tells You

Does Protein Timing Matter for Women? How Fasting Affects Muscle Growth & Metabolism
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Does Protein Timing Matter for Women? How Fasting Affects Muscle Growth & Metabolism

Dr. Stacy Sims: How Women Should Train, Eat & Recover for Long-Term Health | The Best of 2025
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Dr. Stacy Sims: How Women Should Train, Eat & Recover for Long-Term Health | The Best of 2025

3 Keys to Sustainable Weight Loss: Strength, Protein, and Smart Habits
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3 Keys to Sustainable Weight Loss: Strength, Protein, and Smart Habits

Sitting Is Stressing You Out! + 3 Moves to Reset Your Body FAST w/ Garry Lineham
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Sitting Is Stressing You Out! + 3 Moves to Reset Your Body FAST w/ Garry Lineham

How Women Over 40 Should Workout for Best Results & Injury Prevention | Dr. Stacy Sims w Mel Robbins
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How Women Over 40 Should Workout for Best Results & Injury Prevention | Dr. Stacy Sims w Mel Robbins

Over 65? Doing THIS Cuts Osteoarthritis Risk in HALF (supplement, exercise, & diet protocols)
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Over 65? Doing THIS Cuts Osteoarthritis Risk in HALF (supplement, exercise, & diet protocols)

Fitness Coach: Stop Wasting Your Time in the Gym! (Jeff Cavaliere)
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Fitness Coach: Stop Wasting Your Time in the Gym! (Jeff Cavaliere)

How to Use Creatine for Muscle, Brain Power & Better Recovery
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How to Use Creatine for Muscle, Brain Power & Better Recovery

How Much Exercise Do Women 40+ Really Need? Rethinking the 150-minute guideline
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How Much Exercise Do Women 40+ Really Need? Rethinking the 150-minute guideline