Enhance Your H2O
Nothing wrong with water, but for extra-lengthy workouts in the heat, you might want some added power. "When you sweat, you lose more than just water. You also lose electrolytes, which are important for optimal performance! And when your electrolyte stores become depleted, you'll start to lose energy," says Mathews.
Sipping on an electrolyte-enhanced or BCAA-enhanced beverage during your workout can help. Both can come in powdered form, but Powerade and Gatorade also deliver electrolytes. "I suggest a low-sugar powdered electrolyte drink, however, because it serves its hydrating purpose without adding a lot of extra calories you have to account for," she says.