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.
All of the following fit the âmoderateâ definition of exercise: 1  Walking two miles in 30 minutes. 2  Biking five miles in 30 minutes. 3  Swimming laps for 20 minutes.  Running one and a half miles in 15 1  minutes. Doing water aerobics for 30 minutes.  Playing volleyball for 45 1  minutes. Playing pick-up basketball for 20 minutes.  Jumping rope for 15 minutes.