Duration is inversely related to intensity-the lower the intensity, the longer the workout may be. For deconditioned clients, several low intensity, short duration sessions of less than 10 minutes may be preferable. Duration can then be gradually increased as you adapt to training.
Learn how long you should workout for each session. It is recommended that you perform 20 to 60 minutes of continuous aerobic activity or weight training. This does not include warm-up and cool-down.