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.
Exercise means any physical activity that stimulates the vital organs of the body, nourishes them and strengthens them. Yoga is an ancient discipline which is followed across the world today. It first originated in India, more than 6,000 years ago.