If you're feeling sluggish, there's a good chance you're dehydrated. Nearly every system in the body requires water to function properly, so if it doesn't have enough, it slows down. "Drink an 8-ounce glass of cold water, and see if you don't have more energy in just a few minutes," says Teitelbaum.
Credit: Getty Images
Powered By ZergNet
Gear of the Year
102 of the Best Tools, Toys & Tech
Plus: The Woman Who Bails Out the NFL's Bad Boys
ON NEWSSTANDS NOW
Joby Ogwyn: The Man Who Fell to Earth
Life Advice from John Cleese
Sign up to receive the Men’s Journal newsletter and special offers from MJ and its marketing partners.