Regular aerobic exercise increases sleep need for recovering and improving body tissues such as muscles, tendons, and organs related to respiration and blood flow, reports Reuters.

Senior author Sulin Cheng of Shanghai Jiao Tong University in China and the University of Jyvaskyla in Finland and coauthors recruited 45 men ages 30 to 65. Almost all were overweight or obese, with at least three months of insomnia symptoms like difficulty falling asleep, difficulty maintaining sleep, early-morning awakenings or nonrestorative sleep.

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