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.
1a : the act of bringing into play or realizing in action : use the exercise of self-controlb : the discharge of an official function or professional occupation exercise of his judicial dutiesc : the act or an instance of carrying out the terms of an agreement (such as an option) âoften used attributively an option's exercise price.