Glance around any fitness class, and you’ll see all kinds of perspiration. Some exercisers will be drenched from head to toe, while others will have nary a drop of sweat on the brow. Sweat isn’t exactly one of the great mysteries of the universe, but there is still a lot to discover about this amazing built-in skin system.
The human body is equipped with its own cooling system. The skin is covered with approximately two to five million sweat glands that run like ductwork in an attic. How much a person sweats is determined by physiological characteristics, including age and gender, room temperature, the level of exertion during exercise, how anxious a person feels, and whether the person is overweight.
On average, humans can produce up to one to three liters of sweat per hour. Exercise and heat are the most common causes of perspiration because sweat’s main job is to cool down the body. However, stress, anxiety, and excitement can also cause sweating. That’s why foods and beverages that increase anxiety, such as coffee and tea, can ramp up sweat production.