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.
verb (used with object) 1. to put forth or into use, as power; exercise, as ability or influence; put into vigorous action: to exert every effort. 2. to put (oneself) into strenuous, vigorous action or effort.