Question

which condition does exercising regularly reduce the risk of developing?
leukemia
type i diabetes
osteoporosis
multiple sclerosis

Explanation:

Regular exercise helps in maintaining bone - density which reduces the risk of osteoporosis. Leukemia is a cancer mainly related to blood - forming tissues and not directly reduced by exercise. Type I diabetes is an autoimmune disease and exercise doesn't reduce its risk as it is not lifestyle - related in the same way as Type II diabetes. Multiple sclerosis is a neurodegenerative disease and exercise doesn't directly reduce its risk of development.

Answer:

osteoporosis