During exercise, what can caffeine do?

Question

Quizplus · Accepted Answer

Caffeine can lower the rating of perceived exertion (RPE), meaning that the exercise may feel less difficult than it actually is, allowing for potentially longer or harder workouts. However, caffeine does not significantly increase VO2max or raise calcium levels in skeletal muscle. It has been shown to improve endurance performance, but can also have a positive effect on short burst activities. On the other hand, caffeine can increase sensitivity to pain, which may decrease performance.

During Exercise, What Can Caffeine Do