fact, “sweating, per se, provides no health benefits,” Dr Jay said, apart from preventing overheating. The benefits derive from the exercise itself, and the more intense, generally, the greater the health benefits.
Core temperature rises during prolonged and vigorous physical activity, though, and your body must shed that heat. It does so in large part by sweating. The more vigorously you exert yourself, the more internal heat you produce, and the more you must sweat. Such strenuous exercise improves health through many different physiological mechanisms. But perspiring, in and of itself, does not provide or amplify those effects, Dr Jay said.
That situation doesn’t change if you’re sweating due to a hot environment. “Sweat is sweat,” he said. As a rule of thumb, drink when you feel thirsty, so that sweating doesn’t become actually unhealthy.
— GRETCHEN REYNOLDS