Nowadays, there are the consumption of coffee is a lot such as students, adult, and employees. Most people know that caffeine in coffee does not cause sleepy while working or reading. In addition, coffee also reduces stress, stimulates memory and stimulates the function of the metabolic system. In a study on recreational athletes, the consumption that drinks caffeine in coffee increases physical performance. If athletes consume caffeine 6 mg/kg body weight (about 355 mg for a 130 lb. person, or three to four cups of coffee), it significantly increase endurance during brief, intense exercise.