If you’re a java junkie we have happy news for you. Downing 12 ounces of coffee an hour before you hit the gym or track can help you workout longer and boost your endurance. It can also ease exercise-related aches and pains. A 2009 University of Illinois at Urbana-Champaign study found that men who received a jolt of caffeine an hour before bicycling intensely reported less muscle pain during their workout than a similar group of cyclists who went caffeine free. Worried that cup of Joe will dehydrate you? Don’t be. The American College of Sports Medicine states that caffeine isn’t an issue when it comes to hydration.