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                           :   ü ȭ  Ȯϴ ڰܹѹ ⡯ | 
                 
                 
                     ̱ ̿Ŭ , 50 ̻ ǰ  40 ӻѹ߷  ִ ð, ü ȭ ǥ Ȱ ٷ° ຸٴ    Ȯ ǥѹ߷ 30 ̻     ־ѹ߷      ִ ð ϸ  Ƿ̳  ٷ  ϴ ͺ  Ȯϰ ü ȭ  Ȯ  ִٴ   Դ. ѹ߷    ִ ð ȭ ֿ ǥ Ȱ  ִٴ .   (Age-related changes in gait, balance, and strength parameters: A cross-sectional study, ɿ  ,   ٷ ȭ  Ⱦ ܸ鿬)  SCI м ÷ν(PLoS ONE) ƴ.
 
  ̱ ̿Ŭ(Mayo Clinic)  50 ̻ ǰ   40  ȱ, , Ƿ   ٷ ߴ.   65 ̸,  65 ̻̾.  Ʈ  ߰ ߷ ,  ߷ ,  ߰ 켼 ٸ ,  ߰ 켼  ٸ ⸦  30  ߴ.  , 켼  ٸ    ִ ð ̰ 鼭  ũ ϴ  Ÿ. 켼 ٸ 10⸶ 2.22, 켼 ٸ 1.7ʾ پ. Ƿ°  ٷµ 10   Ҽ  ŭ   ũ ʾҴ. Ƿ 10 3.7%  ٷ(1.4%)ٴ   ӵ , ٷ ҿ  ̴ Ȯε ʾҴ. ݸ,  ɷ ̰    ƴ. 8m  θ  ڱ  յڷ Ȱ   Ʈ ̿  ū ȭ  ʾҴ.   ư (Kenton Kaufman) ڻ   ܼ ٷ¸ ƴ ð, , ü   ȭ ʿ ϱ  ü ȭ  ߿ ô   ִ١ ߴ. ״ ѹ߷ 30 ̻    ִٸ ǰ  ϰ ִ ̶͡,  ̸ ݺϸ ȭ    ϸ   ִ١ ߴ.
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