What is the most likely implication if a runner consumes caffeine before a race and then does better than her average for a given distance?

Question

Quizplus · Accepted Answer

There is evidence to suggest that caffeine can enhance both muscle performance and mood, but it is also possible that the runner experienced a placebo effect. Option B is less likely because it is unlikely to be due to chance alone if the improvement is consistent and greater than usual. Option C is not supported by research on caffeine's effects on muscle contraction. Option D is unlikely because caffeine is actually known to delay the onset of muscle fatigue, rather than increasing awareness of it.

What Is the Most Likely Implication If a Runner Consumes