In athletes, physical fitness is more closely correlated with

A. True Maximal oxygen uptake is the ‘gold standard’ of fitness.

B. False Maximal pulse rate is related to age; a slow pulse indicates fitness.

C. False Cardiac output is the usual limiting factor in exercise.

D. False Saturation changes little during exercise; a relatively low lactate level during strenuous exercise is an indication of fitness.

E. True A high resting vagal tone is the cause of the low resting heart rate.