Caffeine

Description

Caffeine is a chemical found in many plants throughout the world. It has become an ingredient in soft drinks but is present naturally in chocolate, tea, and coffee. It is widely believed that caffeine improves both mental and physical performance, and it is probably the most commonly used drug worldwide for performance enhancement. Caffeine is most effective in improving endurance exercise but appears to have little effect on sprinting or exercise at high intensity. Caffeine decreases the perception of fatigue and is used in some pain medications. It is inexpensive and readily available.

Why athletes use it

Athletes use caffeine to improve alertness, increase endurance, and reduce fatigue.

Adverse effects

• Insomnia (difficulty sleeping)

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