Articles by Dr Stacy Sims

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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

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

Resistance Training Is Finally Getting the Respect It Deserves for Health and Longevity

Lifting weights is now recognized as good for more than “just” making muscle. For decades, aerobic exercise was regarded as the primary form of exercise you should do for cardiovascular and other health benefits. Heck, that’s why endurance type exercise such as walking, biking, and running are c...

by Dr Stacy Sims — Oct 14, 2024 intensity lea muscle training

Empowering Female Athletes. Part 2

Digging into the rest of the International Society of Sports Nutrition Female Athlete Position Stand. Here’s what you need to know. In the last blog, I discussed the first part of the International Society of Sport Nutrition (ISSN) Position Stand for the Female Athlete. In case you missed it, we...

by Dr Stacy Sims — Oct 14, 2024 anemia fuel hydration lea supplements

Empowering Female Athletes. Part 1

A Review of the International Society of Sports Nutrition Female Athlete Position Stand I am just back from a whirlwind trip in the US, and one of the stops was to present the new Female Athlete Position Stand at the International Society of Sport Nutrition’s (ISSN) annual conference. The ISSN h...

by Dr Stacy Sims — Oct 14, 2024 anemia creatine fuel hydration lea supplements

Are You Draining Your Body’s Battery Power?

If you’re an active female, chances are you’re at risk for low energy availability and the health consequences it brings. Here’s what you need to know. When researchers screen the nutritional intake of female athletes, a staggering percentage are not eating enough to support their performance a...

by Dr Stacy Sims — Oct 14, 2024 fuel lea nutrition

Rundown? Underperforming? Research Shows You’re Likely Undernourished

Here’s how to make sure you’re eating enough! When women come to me because they’re struggling with poor performance one of the simplest (though not always easiest) and most successful strategies I provide is getting them to eat more. Many women athletes are chronically underfed, whether it’s be...

by Dr Stacy Sims — Oct 11, 2024 lea

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Tags: lea

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