If your knees hurt after a one-week walking regimen, which one of the following workout changes would be most appropriate

A. Wear different shoes.
B. Take a week's rest from exercise.
C. Switch to anaerobic exercise.
D. Jog in a swimming pool.

ANSWER

The correct option is D. 

Jogging in a swimming pool is also called aqua jogging. Aqua jogging involves wearing a flotation device around one's middle and then moving the arms and the legs in a running motion in the deep end of the swimming pool. It is a perfect method for staying fit when injured without impacting the legs. During aqua jogging, the water gives support by taking part of the body weight off the knees and the joints while allowing one to engage in activities that build muscles around the knees. 

answer; i believe that the correct answer is (b) is a factor associated with physical activity and heart disease;

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