But it must be understood, that unless designed otherwise, i.e. unless the Units of Analysis are chosen from all people, most studies are generalizable only for a much narrower population of the people w/in a nation, region, city, etc.
exercising - the activity of exerting your muscles in various ways to keep fit; the doctor recommended regular exercise; he did some exercising; the physical exertion required by his work kept him fit. exercise, physical exercise, physical exertion, workout.
exercise. 1  active use or operation; employment: the exercise of an option. 2  performance (of duties, functions, etc.) 3  activity for the purpose of training or developing the body or mind; systematic practice; esp., bodily exertion for the sake of health.