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约翰·格伦,首次乘坐宇宙飞船进入太空是在1962年。时隔36年后的今天,77岁高龄的老人格伦乘美国“发现号”航天飞机再次进入太空,协助其他宇航员进行科学研究和调查活动。这无疑是对人体机能的巨大挑战。因为在无重力环境下,身体再强健的年轻人也会呈现“老化”症状,即骨骼和肌肉衰竭,平衡感觉解体,睡眠紊乱。已经老化的人体究竟在失重条件下会有什么样的变化;无重力环境下,是否会加速人体的老化;如果无重力下能抑制住
John Glenn, the first space shuttle to enter space in 1962. Today, 36 years later, Glenn, a 77-year-old man, reenters space in the United States under the space shuttle Discovery to help other astronauts conduct scientific research and investigations. This is undoubtedly a huge challenge to the human body. Because in a gravity-free environment, young, physically fit people also experience “aging” symptoms of skeletal and muscular failure, disintegration of balance, and disturbed sleep. What kind of changes will happen to the aging human body under weightlessness, whether human body aging will be accelerated under non-gravity environment, if no gravity can restrain