This is the most common question people ask me when it comes to working out. Sweating during exercise can be a sign of dehydration or overheating, but it could also mean that you’re not hydrating properly beforehand. Dehydration can cause you to sweat less and feel more tired after exercise, so staying well-hydrated helps with endurance training. The best way to hydrate before exercising is by consuming water or sports drinks that have electrolytes in them (like Gatorade). You don’t need too much of these beverages because they contain glucose, which fuels your muscles during long periods of exercise without causing bloat and weight gain. Unless you’re drinking about eight glasses of fluid per day, sweating should never be seen as a bad thing!