29+ Who Said Dont Sweat The Small Stuff. The revolutionary new science of exercise. Or maybe you're the type who can tear through a treadmill session and barely. You're biking up a hill, pedaling as hard as you can. Exercise is the best way to improve brain health, according to john ratey, md, author of spark: The lowdown on your body's natural ac system sweat can be sexy—who hasn't been turned on. We may earn commission from links on this page, but we only recommend products we back. Sweating is your body's major way of getting rid of excess body heat, which is produced by metabolism or working muscles. When sweat evaporates from the surface of your skin, it removes excess heat and cools you. We are constantly sweating, even though we may not notice it. Follow these tips so you can sweat less.