You already know you need to drink H20 before a super-sweaty exercise session, but determining the right amount can be tricky. Plus, leaving class with a headache, feeling thirsty during a workout, or feeling like you drank too much water can be a total downer. That’s why we wondered: How much is the right amount to drink and when?
The best way to keep your legs—and not head—spinning during a humid spin class: Start out well-hydrated. Try to throw back 500ml of water within 30 minutes of beginning your workout. “If you haven’t peed in the last few hours, then you’re probably a little dehydrated,” says Dr. Brendon McDermott, an athletic trainer and assistant professor of kinesiology at the University of Arkansas.