Answer: Exercise regularly to keep his heart and muscles healthy and strong.
Step-by-step explanation:
Physical fitness is the ability of a person to maintain the health and well being. It is the ability of the person to perform the daily routine activities, sports and occupation. The physical fitness can be achieved through moderate to intense exercises, proper nourishment and sufficient amount of rest.
The tennis coach is expected to exercise regularly to keep his heart and muscles strong and healthy. This shows the positive attitude of this coach towards health and physical fitness.