I think youre right but im not positive
The correct answer is A genes okay a part in determined shape and body weight.
Because they are not used to doing exercise. If their body is not used to exercise they might get some injuries in bones and muscles.
Hope it helped,
Happy homework/ study/ exam!
Aerobic exercise reduces the risk of many conditions, including obesity, heart disease, high blood pressure, type 2 diabetes, metabolic syndrome, stroke and certain types of cancer. Weight-bearing aerobic exercises, such as walking, help decrease the risk of osteoporosis.