健身达人如何防止午后疲乏_BEC初级作文

健身达人如何防止午后疲乏

哈佛医学院(Harvard Medical School)睡眠医学部(Division of Sleep Medicine)的负责人查尔斯・蔡斯勒(Charles Czeisler)表示，位于丘脑下部的体内生物钟调控着你每天的体温、褪黑素分泌、血压、睡眠和清醒节律。

As the drive for sleep builds up during the day, it produces midday sleepiness for many people, Dr. Czeisler says. It also causes a surge in alertness that peaks in the late evening, he says. Exposure to artificial light in the evening can extend that second wind into the night, making it difficult to fall asleep and deepening the midday trough in alertness, he says.

蔡斯勒称，白天睡眠动力不断增强，导致许多人中午犯困，还会导致警觉清醒程度在傍晚时分急剧上升，达到高峰。他还称，晚间接触人工照明会将这种精力恢复的状态延长到夜晚，让人难以入睡，并加剧中午的觉醒低谷。

Sitting for a long stretch of time can make people feel more tired, says Natalie Muth, a San Diego primary-care pediatrician and health-care solutions director at the American Council on Exercise, a nonprofit that provides fitness certification and training. Moving your body, even for just a few minutes, can get the blood pumping in your body. 'The heart begins to beat faster, delivering more blood and oxygen to working cells,' says Dr. Muth. This increases the release of hormones like endorphins, which not only help people feel good, but also reverses fatigue.