Water may be the go-to workout beverage, but studies suggest a little caffeine may help, too. Recent research finds moderate caffeine consumption can slow down glycogen depletion and help people conserve energy while working out. Caffeine encourages the body to tap into its fat sources for energy, helping people exercise longer. But it turns out a cup of Joe (or maybe even a can of Red Bull) can do more than increase endurance. Find out more at our article, Can Caffeine Boost Exercise Endurance?