Mix and match from the above to avoid this, and don't continue the identical set of exercises, in the same order, for more than six or eight weeks at a time. After each workout, you should take some time to do some serious stretching. Your muscles are warm then, so that is the best time to do lengthy stretches. Stretch each muscle group for at least 20, and preferably 30 or more, seconds. Calm music and dim lights help many people relax after exercise.
Sleep is an extremely important part of total fitness.
If you are deprived of it, you will never perform at your best level, and severe lack of sleep can actually be dangerous. Many people find that too much sleep can also make you feel tired, drowsy, and irritable. Sleeping far beyond the average, can also be an indication of a physiological, or sometimes psychological, problem. If you consistently sleep for lengthy periods, it might be wise to talk to a physician about it. It's great to just kick off your shoes and give your body a break for a week, once in a while.