Lead study author Dr. Arn Eliasson of Walter Reed Army Medical Center in Washington says results of the study were the opposite of their expectations. Quality of sleep did not improve after days of increased exertion and sleep efficiency did not vary according to the amount of exertion during the day, the study said.
"It has long been recommended, even championed, that getting exercise is part of the recipe for improved sleep. Our data do not support that notion," Eliasson said in a statement.
"The longest sleep and best sleep efficiency occurred after days with low non-exercise exertion -- better rested subjects got less exercise and had less calorie expenditure. After relatively more sleep -- more than six hours -- all measures of exertion decreased."
The study included 14 subjects who wore actigraphy armbands for 23 days. Data regarding total sleep time, sleep efficiency, total energy expenditure, exercise, energy expenditure, non-exercise activity steps and body mass were collected.
Seven subjects had a normal body mass and seven were overweight. Paradoxically, the researchers say, the group considered overweight had a higher total energy expenditure, and took more steps per day.
The study was presented at Sleep, the annual meeting of the Association of Sleep Professionals in Seattle.
SOURCE - http://www.upi.com/health http://www.youtube.com/watch?v=v9Vc41rmR_4
Very interesting and informative video. I personally have problems falling asleep at night and wonder if exercising in the evening could be part of the problem. It would be good to see more studies done on the time and amount of exercise and how is effects a person's sleep patterns. I thought the sample size of only 14 people was low, more research is needed. While exercise is always good for the body, I'm surprised to see the amount of exercise has no effect on the quality of sleep. Sleep is an important part of everyone's daily life and getting a proper night of sleep can increase brain efficiency.
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ReplyDeleteAs an avid participant in exercise and a chronic sufferer of restless sleep I am relieved to hear that exercise does not improve sleep habits. Although I wish it did, it makes me feel better to know that it isn’t just me who does not reap this benefit of exercise. I was told that exercise gives you a boost of energy so that you shouldn’t do it too late at night. I work out after work and go to bed early, so I sometimes thought that maybe I should change up my routine and go early in the morning so I would sleep better, but if it isn’t going to change things I will just stick with my routine. I am a creature of habit. LOL
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