据多年的科学研究证实,人的衰老最先从腿部开始。人进入中年后,双腿肌肉萎缩,足踝及膝关节功能衰退,尤其是直接承受躯体重量,在人体活动中起“支点”作用的膝关节,更易形成老化和病变。因此,专家们提出中老年人应进行健身运动,以促进膝部血液循环,延缓膝关节老化。人在行走时,膝关节软骨面的负重约为自身体重的3倍,爬坡或上楼梯时约为4.25倍,剧烈运动时负重 According to years of scientific research confirmed that human aging first from the legs. People into middle age, legs muscle atrophy, ankle and knee joint function decline, especially directly to the body weight, in human activities play a “fulcrum” role in the knee, the more likely to form aging and lesions. Therefore, experts suggest that middle-aged and elderly people should carry out fitness exercises to promote knee blood circulation and delay knee aging. People walking, the knee cartilage surface weight is about three times its own weight, climbing or climbing stairs is about 4.25 times the weight of strenuous exercise