| 제목 |
Association Between Skeletal Muscle Mass and Cardiorespiratory Fitness in Elderly Men |
| 소속 |
Wonkwang University School of Medicine & Hospital, Department of Rehabilitation Medicine1, Wonkwang University School of Medicine & Hospital, Department of Preventive Medicine2, Pukyong National University, Department of Statistics3 |
| 저자 |
Seung-Hyun Boo1*, Min Cheol Joo1, Jeong Mi Lee2, Seung Chan Kim3, Young Mi Yu1, Min-Su Kim1† |
Aim: Sarcopenia reduces physical ability and cardiorespiratory fitness, leading to poor quality of life. We investigated the relationship between skeletal muscle mass and cardiorespiratory fitness in elderly men.
Methods: We assessed 102 community-dwelling men over 60-year-old. Appendicular skeletal muscle mass was determined using bioelectrical impedance analysis, and the skeletal muscle mass index was calculated as appendicular skeletal muscle mass divided by the square of height. Subjects with an skeletal muscle mass index less than 7.0 kg/m2 were included in the sarcopenic group, as recommended by the Asian Working Group for Sarcopenia. To investigate cardiorespiratory fitness parameters, a cardiopulmonary exercise test was performed using the Bruce protocol. Cardiorespiratory fitness parameters were subdivided into aerobic capacity, cardiovascular response, and ventilatory response.
Results: Of the 102 subjects, 15 (14.7%) were included in the sarcopenic group. There was a positive correlation between skeletal muscle mass index and maximal oxygen consumption (p<0.05), and between skeletal muscle mass index and ventilatory threshold (p<0.05). Additionally, maximal oxygen pulse, which is the maximal oxygen consumption divided by maximal heart rate, was significantly correlated with skeletal muscle mass index (p<0.05). Moreover, maximal oxygen consumption and maximal oxygen pulse showed significant differences between the two groups (p<0.05, all). In multiple linear regression analyses, the factor related to maximal oxygen consumption was skeletal muscle mass index (p<0.05) and that related to maximal oxygen pulse was also skeletal muscle mass index (p<0.05).
Conclusion: This study demonstrated that skeletal muscle mass might be closely associated with cardiorespiratory fitness.
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