experts recommend 30-60 minutes of exercise per day. the 60-minute suggestion is based on the national academy of science's ideal recommendation for people who are trying to lose weight. but you'll get real health benefits (and burn lots of calories) even if you don't work out that much -- especially if you haven't been exercising at all up to now. while 30 minutes of physical activity is considered enough to lower your risk of heart disease stroke and high blood pressure even 10 minutes a day will do you good. remember that you don't have to do all your exercise in one session: a 30-minute aerobics workout in the morning a 20-minute walk after work and 10 minutes of mopping the floor after dinner can do the trick. don't forget to include some strength training and stretching in your workouts too.
how much exercise should i do?