한국 성인 남·여 근육량의 특징 = Age- and Gender-related Differences of Muscle Mass in Korean

국문 초록 (Abstract)

연구배경: 근육에 대한 노화의 영향 및 운동의 효과를 포함한 많은 역학적․임상적 연구 및 임상관리프로그램에서 신체구성 변인 특히 근육량 평가의 중요성에 대한 인식이 늘어나고 있다. 이 연구는 한국인을 대상으로 이중에너지 X-선 흡수법(DXA법)을 이용하여 추정한 근육량을 연령증가와 성별에따른 부위별 특징을 자세하게 조사하는 것을 목적으로 하였다.
방법: 20세 이상 한국인을 대상으로 DXA법을 이용하여 추정한 5,781명(남자: 2,512명, 여자: 3,269명)의 부위별 근육량(팔, 몸통, 다리 및 전신 근육량)을 성별 및 연령대별로 비교·분석하였다.
결과: 남자는 여자보다 근육량이 절대적(48.2 vs. 33.4 kg)·상대적(70.2 vs. 58.9%)으로 많았다(P < 0.001). 성차는 하지보다 상지가 컸다(P < 0.001). 남자는 30대부터, 여자는 40대부터 감소하였지만 현저한 감소는 50대까지 보이지 않았다.
연령 증가에 따른 근육량 감소는 남자가 여자보다 컸고(P <0.001), 변화 형태는 성별로 부위마다 달랐다. 가장 감소가 큰부위는 다리였고, 남자는 20대 이후, 여자는 40대 이후부터 완만하게 감소하다가 남녀 모두 70대에 급격한 저하를 보였다.
결론: 연령증가에 따른 근육량의 감소는 부위별 그리고 성별로 다른 변화를 보였고, 남녀 모두 70대부터 급격하게 감소한다는 사실을 확인하였다. 특히 다리 근육량의 감소를 예방또는 지연하기 위하여 운동트레이닝을 포함한 다양한 개입이필요하다. 이 자료에서 제시된 표준값은 노화 및 질환의 영향,그리고 운동트레이닝 효과와 인종 간의 차이를 평가하는데 비교자료로서 사용될 수 있을 것이다.

참고문헌 (Reference)

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