Articles by Dr Stacy Sims

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Tags: nutrition

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Menopause Changes Your Gut—Here’s Why It Matters

Most conversations about menopause focus on hormones. But there’s another system quietly shifting at the same time: your gut microbiome. The trillions of bacteria living in your gut influence everything from metabolism to immune function to brain health. And during perimenopause and menopause, ...

by Dr. Stacy Sims — Mar 12, 2026 gut intensity menopause microbiome nutrition perimenopause supplements

How Plants and Protein Can Help You Through Menopause

Most active women underestimate their daily protein needs—and the consequences become more pronounced in perimenopause and menopause. The current RDA for protein was established to prevent deficiency in sedentary people, not to help active women optimize their training and recovery—or to thrive...

by Dr. Stacy Sims — Mar 10, 2026 gut menopause microbiome nutrition perimenopause protein vegetarian

What Racing Kona Taught Me

Racing Kona Taught Me More Than I Ever Expected In October 2000, I stood on the start line of the Ironman World Championship in Kailua-Kona, Hawaii. I had no idea that day would shape the rest of my career—not just as an athlete, but as a scientist. Kona is brutal. It’s long, hot, humid, wind...

by Dr. Stacy Sims — Oct 06, 2025 fueling heat hydration nutrition training

ROARing into the New Year

The new revised edition of ROAR is out! Here’s what’s new. When I started working on ROAR nearly ten years ago, it was still considered fringe to say that women’s unique hormones and their menstrual cycles could impact everything from performance to injury risk to hydration and beyond. That was ...

by Dr Stacy Sims — Oct 14, 2024 nutrition roar training

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

Gut Health for Active Women

Updated March 11, 2026 Why Your Microbiome Matters for Hormones, Metabolism, and Performance When we talk about fueling for training and performance, most of the focus is on what you eat. But there’s another critical part of the equation that often gets overlooked: what your gut microbes do wit...

by Dr Stacy Sims — Oct 14, 2024 carbohydrates fuel gut hormones intensity menopause microbiome nutrition perimenopause protein

Should Women Take Collagen Supplements?

Collagen is the current darling of the wellness industry. It can benefit a lot of women, but not all supplements work the same. More women (and men for that matter) are interested in collagen supplements than ever before. Weightlifters believe they can enhance muscle mass. Athletes want them to ...

by Dr Stacy Sims — Oct 13, 2024 collagen nutrition supplements

Can (and Should) Women Carb Load?

What you need to know about the pre-event pasta party. Women perform best when they’re well-fueled. Anyone who follows me here is clear on that. Women should prioritize protein to make and maintain our muscles. We also need carbs, of course, to fuel our exercise, training, and competition. But w...

by Dr Stacy Sims — Oct 13, 2024 carbohydrate fuel nutrition

Women, Concussions, and Long Covid: Science Shows We’re More Susceptible

Females appear more sensitive to brain tissue inflammation. Here’s what might help. Scientists have recently reported that women are more likely than men to experience long COVID after an infection, and are significantly more likely to experience related complications in the brain and suffer moo...

by Dr Stacy Sims — Oct 13, 2024 concussion covid nutrition supplements

Female Athletes Need Carbohydrates

Men do, too. Research shows another downside to low-carb training. Women perform best in a fueled state. That means eating carbohydrates. That shouldn’t be a radical concept. Carbs are the preferred fuel source for our brain; they’re necessary to fuel high intensity efforts, and they improve exe...

by Dr Stacy Sims — Oct 12, 2024 carbohydrate nutrition

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Tags: nutrition

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