Nothing screams summer like a good sweat under the hot sun, but if you’re not replacing fluid as fast as your body’s pumping it out of your pores, your outdoor workout could be cut short by sluggishness, cramped muscles or even life-threatening heat illness. How do you know if you’re in danger? We asked Douglas Casa, PhD, an exertional heat stroke expert and chief operating officer at the University of Connecticut’s Korey Stringer Institute, to pinpoint five dehydration symptoms to watch for when exercising al fresco.
- Editor Obsession: Shoes We LoveOur editors' picks for the best shoes for the coming season.
- Six Spirits That Will Save Your Holiday SeasonThey're key to any holiday gathering.
- 8 Holiday Cocktails Made with MoonshineMust-try recipes from America's most visited distillery.
- Form CheckThe easy reminders for five basic lifts.