A byproduct of a study on the effects of exercise on breast cancer is that older women who exercise in the morning experience better sleep than those who exercise in the evening, according to the article “Morning Exercise May Help Sleep.” So if you’re wanting better sleep, think about becoming an early bird.
This study didn’t try to find a reason why early birds sleep better. But some speculate that early morning exercise may reset your circadian rhythm toward daily activity and nightly sleep patterns. Whereas exercising at night may tell your body you want to remain active all night.
That’s because exercise raises your body temperature, increases activity hormones and creates lactic acid, all which makes you more restless and discourages sleep. A good night’s sleep, on the other hand, requires a slight drop in body temperature, and you definitely don’t want an increase in activity hormones if you’re wanting to sleep.
The WebMD article “Why You’re an Early Bird or a Night Owl” agrees with this speculation by stating: “Morning people, however, also have advantages. Larks generally sleep better, have more regular sleep patterns, and have more flexible personalities.”
If you’re having trouble sleeping at night, it may be because you’re trying to do too much in the late afternoons and evenings. Try being more active in the morning, and less active in the afternoon and evenings. And it’s best to do your exercise routine in the mornings.
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