美国科学家发现，适度的体育锻炼可提高老年人的睡眠质量。斯坦福大学的科学家挑选了43名经常坐着工作、年龄在50-76岁的男性老人进行分组实验，这些老人都有睡眠障碍，每天最多能睡6小时，每次入睡至少需25分钟。实验中，一个小组的老人每周进行一次两小时的健身活动、两次各4 American scientists found that moderate physical exercise can improve the quality of sleep in the elderly. Stanford University scientists selected 43 men and women, aged 50-76, often working in groups to sleep. Each of them had sleep disorders, sleeping up to six hours a day and taking at least 25 minutes each time they fell asleep. In the experiment, a group of elders performed one-two-hour fitness activities twice a week