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.

○ a
○ b
○ c
○ d

Explanation:

To determine the correct answer, we analyze each option:

• Option A: Experienced athletes are typically motivated to improve their fitness, so this is incorrect.
• Option B: Experienced athletes usually can commit training time, so this is not a valid reason.
• Option C: Experienced athletes have already reached high cardiorespiratory fitness levels, making further increases difficult due to the law of diminishing returns in training adaptations.
• Option D: Since option C is correct, D is incorrect.

Answer:

C. they have already achieved high levels of cardiorespiratory fitness