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.
What does 'Exercise' mean. Exercise means to put into effect the right specified in a contract. In options trading, the option holder has the right, but not the obligation, to buy or sell the underlying instrument at a specified price on or before a specified date in the future.