Caffeine has been consumed and celebrated around the world for centuries. When taken in proper quantities, caffeine has been shown to give many advantages during exercise. Caffeine works by slowing down the release of adenosine — a chemical that makes us feel sleepy.
This is great news for athletes, as caffeine will reduce feelings of fatigue and boost mental alertness. Recent studies have also shown caffeine can increase our tolerance and ability to deal with discomfort — a good thing for endurance sports.