Exercise and sleeping

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Experts say that the sleep-making or sleepbreaking power of exercise may be more psychological than physical. While muscle does produce deep muscular relaxation, it is only a short-lived sensation. Sleeping after exercise may be a learned response, not a requirement. Most of us often link exercise to sleeping because much of our exercise life takes place when conditions for dropping off are best: at night, in the dark, in bed. In fact, there is a theory that the sleep-inducing exhaustion ascribed to exercise is probably due to the late hours and lack of sleep that often accompany the act of relaxation.