Articles by Dr Stacy Sims

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Is It Perimenopause? What to Know Before You Start MHT

Menopause hormone therapy (MHT) is one of the topics I’m asked about most, and the conversation around it has changed dramatically over the years. For two decades after the 2002 Women’s Health Initiative (WHI) study, women were told hormones were dangerous (which was largely a fault of media mi...

by Dr. Stacy Sims — Oct 19, 2026 contraception hormones lea menopause menstrual cycle mht perimenopause period sleep strength tracking

Understanding PCOS in Active Women

If you’ve ever been told you have PCOS, you’re not alone—and you’re certainly not the only one confused by what that diagnosis really means. Polycystic Ovary Syndrome (PCOS) is one of the most common hormonal conditions affecting women of reproductive age, yet it’s also one of the most misund...

by Dr. Stacy Sims — Nov 07, 2025 carbohydrates cold fueling heat hormones menstrual cycle period protein

The Evolution of Menstrual Cycle Training

Why We’ve Moved on from “Train by Your Phase.” For years, the conversation about women’s training centered on the menstrual cycle: do high-intensity work in the follicular phase, focus on endurance in the luteal phase, and rest during your period. (And for transparency here, I was one of the ...

by Dr. Stacy Sims — Oct 14, 2025 hormones menstrual cycle period tracking training

Training Girls Through Puberty

If you’ve followed me for a while, you know I’m all about helping women work with their physiology, not against it. And while I’ve covered this extensively for women aged ~25+, an area of emerging interest for me—especially with a teenage daughter—has been learning and researching more about ...

by Dr. Stacy Sims — Sep 03, 2025 coaching fueling hormones lea menstrual cycle period sit

How to Track Your Menstrual Cycle

Take your performance to the next level by understanding your unique physiology. In the summer of 2019, the U.S. Women’s National Team (USWNT) won the World Cup, making it the U.S. women’s fourth World Cup title. They scored a record-setting 26 goals throughout the tournament and also made histo...

by Dr. Stacy Sims — Oct 14, 2024 contraception hormones menstrual cycle perimenopause period tracking training

Training and Racing Through PMS

By working with your premenstrual physiology, you can make progress (and yes, podiums) despite the challenges of premenstrual syndrome. By now, you’ve heard me talk all about “period power”—that your menstrual cycle is when your body is more resilient to stress and a great time to nail your high...

by Dr Stacy Sims — Oct 13, 2024 period pms

Period Power

Menstruation can be a prime time for PRs. Here’s how to go with the flow (no matter how heavy your flow). “What’s the matter, you on the rag?” “Hey ‘ladies,’ are you going to get your heads in the game, or do you need some tampons?” When I was coming up through sports, it wasn’t uncommon for mal...

by Dr Stacy Sims — Oct 11, 2024 anemia period

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