Department of Health and Nutrition, Yonezawa Women's Junior College of Yamagata Prefecture , Japan.
J Sports Sci Med. 2011 Sep 1;10(3):491-7. eCollection 2011.
To determine the characteristics of maximum pedaling performance in the recumbent and supine positions, maximum isokinetic leg muscle strength was measured in eight healthy male subjects during pedaling at three velocities (300°/s, 480°/s, and 660°/s), and maximum incremental tests were performed for each position. The maximum isokinetic muscle strength in the recumbent position was 210.0 ± 29.2 Nm at 300°/s, 158.4 ± 19.8 Nm at 480°/s, and 110.6 ± 13.2 at 660°/s. In contrast, the muscle strength in the supine position was 229.3 ± 36.7 Nm at 300°/s, 180. 7 ± 20.3 Nm at 480°/s, and 129.6 ± 14.0 Nm at 660°/s. Thus, the maximum isokinetic muscle strength showed significantly higher values in the supine position than in the recumbent position at all angular velocities. The knee and hip joint angles were measured at peak torque using a goniometer; the knee joint angle was not significantly different between both positions, whereas the hip joint angle was greater in the supine position than in the recumbent position (Supine position: 137.3 ± 9. 33 degree at 300°/s, 140.0 ± 11.13 degrees at 480°/s, and 141.0 ± 9.61 degrees at 660°/s. Recumbent position: 99.5 ± 12.21 degrees at 300°/s, 101.6 ± 12.29 degrees at 480°/s, and 105.8 ± 14.28 degrees at 660°/s). Peak oxygen uptake was higher in the recumbent position (50.3 ± 4.43 ml·kg(-1)·min(-1)) than in the supine position (48.7 ± 5.10 ml·kg(-1)·min(-1)). At maximum exertion, the heart rate and whole-body rate of perceived exertion (RPE) were unaffected by position, but leg muscle RPE was higher in the supine position (19.5 ± 0.53 than in the recumbent position (18.8 ± 0.71). These results suggest that the supine position is more suitable for muscle strength exertion than the recumbent position, and this may be due to different hip joint angles between the positions. On the contrary, the endurance capacity was higher in the recumbent position than in the supine position. Since leg muscle RPE was higher in the supine position than in the recumbent position, it was suggested that different burdens imposed on active muscles in both positions exerted an impact on the result of the endurance capacity. Key pointsIsokinetic maximal peak torque measured in this study during pedaling showed higher values in the supine position than in the recumbent position at all angular velocities.Maximum oxygen uptake as evaluated by maximum incremental testing showed higher values in the recumbent position than in the supine position.No significant changes in the angle of peak torque for the knee joint or hip joint were observed in either the recumbent or supine position even at an increased angular velocity. These observations indicate the effectiveness of a cycle-type muscle strength assessment device for evaluating leg muscle strength.
为了确定卧位和仰卧位时最大蹬踏性能的特点，对 8 名健康男性受试者在三种速度（300°/s、480°/s 和 660°/s）下蹬踏时进行了最大等速腿部肌肉力量测量，并对每个位置进行了最大递增测试。卧位时的最大等速肌肉力量在 300°/s 时为 210.0±29.2 Nm，在 480°/s 时为 158.4±19.8 Nm，在 660°/s 时为 110.6±13.2 Nm。相比之下，仰卧位时的肌肉力量在 300°/s 时为 229.3±36.7 Nm，在 480°/s 时为 180.7±20.3 Nm，在 660°/s 时为 129.6±14.0 Nm。因此，在所有角速度下，最大等速肌肉力量在仰卧位时均显著高于卧位。使用量角器测量峰值扭矩时的膝关节和髋关节角度；两个位置的膝关节角度没有显著差异，而髋关节角度在仰卧位时大于卧位（仰卧位：300°/s 时为 137.3±9.33 度，480°/s 时为 140.0±11.13 度，660°/s 时为 141.0±9.61 度。卧位：300°/s 时为 99.5±12.21 度，480°/s 时为 101.6±12.29 度，660°/s 时为 105.8±14.28 度）。最大摄氧量在卧位（50.3±4.43 ml·kg(-1)·min(-1))时高于仰卧位（48.7±5.10 ml·kg(-1)·min(-1))）。在最大用力时，心率和全身感觉用力（RPE）不受位置影响，但腿部肌肉 RPE 在仰卧位（19.5±0.53）时高于卧位（18.8±0.71）。这些结果表明，仰卧位比卧位更适合肌肉力量发挥，这可能是由于两个位置的髋关节角度不同。相反，卧位的耐力能力高于仰卧位。由于仰卧位时腿部肌肉 RPE 高于卧位，因此不同位置对主动肌肉的不同负荷对耐力能力的结果产生了影响。关键点本研究在蹬踏时测量的等速最大峰值扭矩在所有角速度下均显示仰卧位时高于卧位。最大递增测试评估的最大摄氧量在卧位时高于仰卧位。即使在增加角速度时，膝关节或髋关节的峰值扭矩角度在卧位或仰卧位时也没有明显变化。这些观察结果表明，自行车式肌肉力量评估设备对于评估腿部肌肉力量是有效的。
