Regarding the effect of caffeine on exercise performance, a review of the available research suggests
A) caffeine ingestion increases epinephrine levels during exercise and may exert a stimulating psychological effect.
B) the perception of effort during exercise is heightened and thereby improves performance.
C) abstaining from caffeine for 2-4 days prior to competition heightens the effect of caffeine when taken.
D) caffeine may raise serum free fatty acids levels at rest just before exercise and increase the use of fat as an energy source during exercise.
Correct Answer:
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