A: Caffeine blocks adenosine receptors in your brain and increases adrenaline, dopamine, norepinephrine, and serotonin levels.

The result? You have more energy during your workout to lift heavier weights or run faster than you could have otherwise done without any stimulation from caffeine! 

Caffeine acts as an ergogenic aid, which means it improves athletic performance and increases endurance.

Read more about the benefits of Caffeine and Drinking Coffee here.