Summer training can feel extra intense—and if you’re noticing more fatigue, gut discomfort, or feeling like your usual water bottle isn’t cutting it… you’re not alone.
Here’s what you need to know: women’s bodies respond differently to heat, hydration, and exercise—and that matters, especially in midlife.
Why Heat Feels Harder
When we train in the heat, blood flow shifts away from the gut and liver to help cool us down. But women have some key physiological differences:
We start sweating later and sweat less than men.
We heat up faster, especially during the luteal phase or in peri/post-menopause.
Our smaller body size and lower total body water mean we’re at higher risk of dehydration and overhydration (yes, both!).
Hydration Mistakes I See:
Many women overdrink plain water—especially during long workouts or hot days—without replacing sodium. This can lead to exercise-associated hyponatremia (EAH), or dangerously low sodium levels.
What To Do Instead:
Here’s how to hydrate smarter—not just more:
Don’t rely on plain water alone. Choose hydration drinks with a mix of sodium + glucose to support absorption and prevent GI upset.
Skip the salt tabs. You don’t need to replace every drop of sweat—just optimize what you take in.
Aim for ~0.16 oz of fluid per pound of bodyweight per hour during intense exercise in heat (about 22 oz/hour for a 140-lb woman).
Bonus Tip: L-glutamine (supplemented for 7 days) may help gut function in the heat.
Listen to Your Body
You can generally drink to thirst if:
You’re hydrated going in
You’re acclimated to heat
You’re in the luteal phase
You’re not doing back-to-back sessions
But you may need to drink on a schedule if:
You’re peri- or post-menopausal
You’re not heat-acclimated
You’ve had heat-related issues in the past
You’re training at altitude or twice a day
Hydration is not one-size-fits-all, especially for women. This summer, honor your physiology, fuel wisely, and hydrate with intention.
You’re stronger than you think—and you’re built to thrive.