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.
1. bodily or mental exertion, esp. for the sake of training or improvement. 2. something done or performed as a means of practice or training. 3. a putting into action, use, or effect: the exercise of caution. 4. a written composition, musical piece, or artistic work executed for practice of technique.