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adaptogens altitude anemia anxious body image bones carbohydrate circadian rhythms coaching cold collagen concussion contraception cortisol covid creatine fuel fueling gut heat hiit hormones hrt hrv hydration incontinence intensity intermittent fasting iron jetlag keto lea lhs lift heavy longevity menopause menstrual menstrual cycle mht microbiome muscle nutrition perimenopause period plyometrics pms pregnancy protein recipes recovery roar sit sleep strength supplements tracking training vegetarian zone
What to Do Differently in Peri & Postmenopause
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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
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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
What Racing Kona Taught Me
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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
Train for Power—Not Just Strength
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Most active women love to move. Whether it’s running, riding, swimming, lifting, yoga, or simply chasing your kids around, we love to break a sweat and feel the physical and mental benefits that come from that. But there’s one form of training that too often gets overlooked: power training.
W...
by Dr. Stacy Sims —
Sep 19, 2025
fueling
lhs
lift heavy
longevity
strength
Training Girls Through Puberty
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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 HIIT Matters for Women’s Body and Brain Health
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If you’ve been following me for a while, you know I love busting myths—especially in women’s training. One of the most persistent? “More long, steady cardio is always better.”
Don’t get me wrong—Zone 2 training has its place. It builds your aerobic base, supports mitochondrial health, and imp...
by Dr. Stacy Sims —
Aug 20, 2025
cortisol
creatine
hiit
intensity
longevity
recipes
supplements
Longevity Advice Women Actually Need
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If you’re tuned into the health and fitness world (which I’m assuming you are if you’re here!) then I’m sure you’ve heard plenty of influencers and experts talking about “longevity” and the importance of living better for longer. Yet as with so many things, I’m acutely aware that much of the ...
by Dr. Stacy Sims —
Aug 06, 2025
cold
collagen
hydration
lift heavy
longevity
supplements
Recipe: Overnight Protein Oats
The perfect breakfast for busy mornings on-the-go!
“Six ingredients, many great variations, and theperfect make-ahead high-protein breakfast for yourbusy mornings on-the-go!” -SS
by Dr. Stacy Sims —
Aug 05, 2025
protein
recipes
Why Women Struggle with Sleep—Especially in the Summer
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If you’re finding it harder to sleep, especially with the summer heat, you’re not alone. Women face unique sleep challenges—largely due to hormone fluctuations, different circadian rhythms, and even how we respond to temperature. But with the right strategies, you can improve your sleep, feel...
by Dr. Stacy Sims —
Jul 23, 2025
adaptogens
carbohydrate
circadian rhythms
heat
hydration
sleep
Why Heat Impacts Women Differently
With heat waves sweeping across parts of the U.S. and Europe, summer training just got a lot more intense. As an active woman, you might already feel the difference—more fatigue, maybe some gut issues, and a general sense that your usual hydration or fueling strategy just isn’t cutting it.
You’...
by Dr. Stacy Sims —
Jul 10, 2025
heat
hydration
recipes
training
Recipe: High-Protein Mac & Cheese
A high-protein twist on a classic.
" Creamy and satisfying, one the kids will love!" —SS
by Dr. Stacy Sims —
Jun 30, 2025
recipes
Why Fasting Doesn’t Work for Active Women
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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
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