Masuda Takayuki, Takeuchi Shinta, Kubo Yusuke, Nishida Yusuke
Department of Rehabilitation, Hamamatsu University School of Medicine, University Hospital: 1-20-1 Handayama, Higashi-ku, Hamamatsu-shi, Shizuoka 431-3192, Japan.
Department of Physical Therapy, School of Health Sciences at Narita, International University of Health and Welfare, Japan.
J Phys Ther Sci. 2022 Mar;34(3):199-203. doi: 10.1589/jpts.34.199. Epub 2022 Mar 14.
[Purpose] Intensity for resistance exercise is estimated based on the maximum muscle strength. Exercise prescription without evaluating the biological response has a challenge. This study aimed to confirm whether anaerobic threshold measured using cardiopulmonary exercise test in resistance exercise is appropriate or not. [Participants and Methods] Resistance exercise adopted for the study was right-leg knee extension. The participants were 10 healthy young males. We investigated whether the oxygen uptake kinetics achieved a steady state within 3 min during the constant-load test with knee extension at 80% anaerobic threshold using cardiopulmonary exercise test with knee extension. If oxygen uptake kinetics achieved a steady state within 3 min, the exercise intensity measured using cardiopulmonary exercise test was considered appropriate. [Results] Anaerobic threshold was measured using the conventional approach in all participants. The steady state of oxygen uptake kinetics could be achieved within 3 min. In the constant-load test with knee extension at 80% anaerobic threshold, the oxygen uptake kinetics achieved a steady state within 3 min. [Conclusion] Based on the findings, the anaerobic threshold obtained using cardiopulmonary exercise test with resistance exercise was judged as appropriate. The results of this study contribute to the accurate setting of exercise load for resistance exercise and condition setting for the evaluation of skeletal muscle function.
[目的] 抗阻运动强度是根据最大肌肉力量来估算的。在不评估生物学反应的情况下进行运动处方制定存在挑战。本研究旨在确认在抗阻运动中使用心肺运动试验测得的无氧阈是否合适。[参与者与方法] 本研究采用的抗阻运动是右腿膝关节伸展。参与者为10名健康年轻男性。我们通过膝关节伸展心肺运动试验，在80%无氧阈下进行膝关节伸展恒负荷试验期间，研究摄氧量动力学是否在3分钟内达到稳定状态。如果摄氧量动力学在3分钟内达到稳定状态，则认为使用心肺运动试验测得的运动强度是合适的。[结果] 所有参与者均采用传统方法测量无氧阈。摄氧量动力学的稳定状态可在3分钟内实现。在80%无氧阈下进行膝关节伸展恒负荷试验时，摄氧量动力学在3分钟内达到稳定状态。[结论] 根据研究结果，通过抗阻运动心肺运动试验获得的无氧阈被判定为合适。本研究结果有助于准确设定抗阻运动的运动负荷以及评估骨骼肌功能的条件设定。
