Question

charles has been involved in a fitness program that involves brisk walking three times a week.______will help charles continue to improve his fitness.
multiple choice
alternating the volume of activity
decreasing the time of activity
maintaining the type of activity
increasing the intensity of activity

Explanation:

To continue improving fitness, increasing the intensity of activity (like walking faster or on an incline) challenges the body more. Alternating volume (e.g., changing distance) can help but increasing intensity is a key principle of progressive overload. Decreasing time would reduce the stimulus for improvement. Maintaining the same type without increasing intensity means the body adapts and plateaus.

Answer:

Increasing the intensity of activity