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  • Caffeine
    • can help mental alertness, concentration and reaction time
    • reduces the feeling of fatigue, allowing exercise at higher intensities for longer
    • can increase the body's ability to utilise fat as a fuel and increase aerobic capacity
    • used by many endurance athletes
    • increases nervousness, anxiety and restlessness
    • dehydration increased (diuretic)
    • addictive substance


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