Articles by Dr Stacy Sims

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Tags: hormones

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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 carbohydrate cold fuel fueling heat hormones menstrual cycle period protein

Cold Plunging for Women: Why Colder Isn’t Always Better

Cold plunging has exploded in popularity, with everyone from elite athletes to wellness influencers posting their ice bath rituals. But long before it hit social media, cold-water immersion was a Nordic tradition—often paired with saunas—as a way to build resilience, reset the mind, and conne...

by Dr. Stacy Sims — Nov 05, 2025 cold cortisol hormones recovery training

Kisspeptin: What We Learned from Rodents—and How We’ve Moved On

When I talk about female athletes, hormones, and health, I always start from a simple but critical foundation: energy availability. It’s the balance between how much energy you take in (from food) and how much you expend (through training, daily life, and basal metabolic rate). When that bala...

by Dr. Stacy Sims — Oct 24, 2025 cortisol fueling hormones lea menstrual cycle

What to Do Differently in Peri & Postmenopause

Perimenopause vs. Postmenopause: What Active Women Need to Know With World Menopause Day happening tomorrow, it feels like the right time to address some key questions I’m often asked about perimenopause and postmenopause. I know only too well that navigating these changes can feel confusing,...

by Dr. Stacy Sims — Oct 17, 2025 hiit hormones intensity menopause perimenopause training

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 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

Why Fasting Doesn’t Work for Active Women

Of all the topics I cover, fasting is easily one of the most polarizing. But it’s also one I feel strongly about—because the science is clear, and I want to help women avoid its many pitfalls. While some women do say they feel good when fasting, the long-term research tells a different story....

by Dr. Stacy Sims — Jun 25, 2025 carbohydrate cortisol hormones intermittent fasting

Next Gen Is Here!

My Next Gen course has been two years in the making, so I’m hugely excited to share it with you today. If you’ve not already signed up, you can do so here! I’d also like to share my motivation behind creating this course and give you some insights into some of the content and topics covered. ...

by Dr. Stacy Sims — Apr 16, 2025 body image coaching hormones

Mainstream Menopause Advice is Misleading Active Women

Fasting, keto, low carb, all zone 2 all the time…those rules are not for us. It’s been two years since my menopause training book, Next Level, came out and three years since we started working on it. Though it’s nearly impossible to believe at this point, just three or four years ago, menopause ...

by Dr. Stacy Sims — Oct 14, 2024 creatine fueling hormones menopause perimenopause zone

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Tags: hormones

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