Question

increasing cardiorespiratory fitness levels is difficult for experienced athletes because _. a. they are not motivated to increase their levels of cardiorespiratory fitness b. they cannot commit the training time to increase their cardiorespiratory fitness c. they have already achieved high levels of cardiorespiratory fitness d. none of the above please select the best answer from the choices provided.

Explanation:

Experienced athletes typically have already reached high - level cardiorespiratory fitness. As they are near their physiological limits, further significant increases are difficult. Options A and B are not the main reasons for the difficulty; motivation and time commitment are not the core factors compared to the existing high - level fitness.

Answer:

C. they have already achieved high levels of cardiorespiratory fitness