07/24/2026
"I used to tolerate heat just fine. Now I'm wiped out so much faster." I hear this from patients constantly this time of year, and it's not in your head.
After menopause, your body's cooling system changes: blood vessels dilate less efficiently, your internal thermostat gets more sensitive, and you have less fluid reserve to work with. The result is that the same walk, the same yard work, the same workout can feel genuinely harder in the heat.
"I used to tolerate heat just fine. Now I'm wiped out so much faster." I hear this from patients constantly this time of year, and it's not in your head.
After menopause, your body's cooling system changes: blood vessels dilate less efficiently, your internal thermostat gets more sensitive, and you have less fluid reserve to work with. The result is that the same walk, the same yard work, the same workout can feel genuinely harder in the heat.
I wrote up what's actually happening physiologically, plus practical guidance on hydration, why "just drink more water" isn't quite right, and how much fluid you actually need.
The real physiology behind it, and what to do about hydration (it's not just "drink more water").