I'm a 57 year old grandmother. When I was in my late 20's and 30's, I taught aerobic exercise and dance. It proved to be the best thing for me because I love to dance, plus, since I was an instructor, I was forced to be at the studio every day. Now, I'm retired and going to the gym seems to take up so much effort. Instead of leaving home to exercise, I stay home and do one-minute exercises throughout the day. I do a minimum of 20 one-minute sessions each day. I pick strategic times throughout the day, such as during commercials, after snacks and meals, while I am on the phone, any time is a good time. It works very well for me. I pick an exercise and do it for a minute. It could be squats, push-ups, arm curls with a can of soup in each hand, sit-ups, whatever! The key is to do it for a minute. There is hardly a day that I can't find one minute here and there to give me a total of 20 minutes of exercise a day. In fact, right after I post this answer, I'm going to do one minute of squats!