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                           :   Ϸ翡 7,000,  δ () | 
                 
                 
                     ǰϰ  ⸦ Ѵٸ  ʼ̴.       ִ  ȱ ̴. ȱ ȿ    ƴ.   ȱ ü  ȿ Ӹ ƴ϶   ȴ. ٸ Ϸ翡  ȴ   ֱ ǥ   Ϸ翡  7,000 ̻ ȴ     Ѵ.
    ̱ Żб ָӽƮķ۽(University of Massachusetts-Amherst) ü(Kinesiology)  Ƹ ȷġ(Amanda Paluch)   38~50  2,110  ȴ  ȴ ӵ,     ߴ.  Ϸ ȴ 翡  ũ 7,000 ̸ ȴ , 7,000~9,999 ȴ , 10,000 ̻ ȴ  .  10.8   ,   72 ߴ. ٺ   м ,  Ϸ 7,000 ̸ ȴ    Ϸ 7,000~9,999 ȴ     72%, Ϸ 10,000 ̻ ȴ    55% ߴٰ .   , д      ؼ  ߴ.    , д    ̿ ǹ  ٰ . ̹  3(ð) ̱ǻȸ м JAMA Ʈũ (JAMA Network Open) Ǿ.  ùٸ ȱ ڼ տ ް  ִٴ   Ȳġ 90 θ   յڷ  , ü  15  ٶ  . , 㸮 Ʋ ,   а Ͽ    κ Ǵ   Ѵ.  鿡   ߵڲġ    ߹ٴ, ղġ  ϴ  ùٸ ȱ ڼ.
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