Low-impact aerobics is a particularly good way for beginners and overweight people to start. In fact, many people continue to do only low-impact exercises because they find them more comfortable and because the possibility of injury is reduced.
Variety comes from using different strokes.
3x week conditions heart and lungs. Type III does not condition heart and lungs, but can be enjoyable, improve coordination and muscle tone, and help relieve tension. The late afternoon workout provides a welcome change of pace at the end of the day and helps dissolve the day's worries and tensions. Another popular time of day to work out is early morning, before the day's main activities begin. Advocates of the early start say it makes them more alert and energetic during the day.