Faculty of Education and Welfare, Biwako-Gakuin University, Higashiomi, Japan.
Department of Sports Medicine for Health Promotion, Tokyo Medical University, Shinjuku, Japan.
Adv Exp Med Biol. 2024;1463:365-370. doi: 10.1007/978-3-031-67458-7_59.
The aim of this study was to investigate the skeletal muscle O dynamics during body-weight resistance exercise with slow movement and tonic force generation. Thirteen untrained, healthy, young males performed Bulgarian split squats and push-ups until volitional failure. Relative changes from rest in oxygenated haemoglobin (oxy-Hb) and deoxygenated haemoglobin (deoxy-Hb) concentrations were continuously monitored at the vastus lateralis (VL) and rectus femoris (RF) muscles during squats, and pectoralis major (PM) and triceps brachii (TB) muscles during push-ups using spatial resolved near-infrared spectroscopy oximetry. During the squat exercise, deoxy-Hb continuously increased at RF until failure (10.8 ± 7.0 μmol/L), while at VL, deoxy-Hb was relatively maintained during 25-100% of the number of maximum repetitions (18.0 ± 7.4 μmol/L at volitional failure). During the push-up exercise, a significant increase in deoxy-Hb was observed during exercise from rest at PM and TB. We found a significant increase in oxy-Hb during exercise at PM (28.1 ± 15.8 μmol/L at volitional failure), while at TB, no significant difference was observed from rest (-2.7 ± 13.7 μmol/L at volitional failure). Our findings suggest that the deoxygenation patterns during body-weight squat exercise were heterogeneous within the quadriceps muscles. Moreover, differences in O dynamics between the trunk and extremity muscles may be partly explained by convective O supply during resistance exercise. However, future studies are needed due to inter-individual differences in skills for body-weight resistance exercise.
本研究旨在探讨在进行慢速、等长力量产生的抗阻运动时，骨骼肌的氧动力学。13 名未经训练的健康年轻男性完成保加利亚分腿蹲和俯卧撑，直至力竭。在分腿蹲时，使用空间分辨近红外光谱血氧仪连续监测股外侧肌（VL）和股直肌（RF）的氧合血红蛋白（oxy-Hb）和去氧血红蛋白（deoxy-Hb）浓度的相对变化，在俯卧撑时监测胸大肌（PM）和肱三头肌（TB）的变化。在蹲起运动中，RF 的 deoxy-Hb 持续增加直至力竭（10.8 ± 7.0 μmol/L），而在 VL 中，deoxy-Hb 在 25-100%最大重复次数时相对保持（在力竭时为 18.0 ± 7.4 μmol/L）。在俯卧撑运动中，PM 和 TB 在运动开始时的 deoxy-Hb 显著增加。我们发现 PM 在运动中 oxy-Hb 显著增加（在力竭时为 28.1 ± 15.8 μmol/L），而在 TB 中，与静息时相比没有显著差异（在力竭时为-2.7 ± 13.7 μmol/L）。我们的研究结果表明，在进行等长抗阻运动时，股四头肌的脱氧模式存在异质性。此外，躯干和肢体肌肉之间的 O 动力学差异可能部分可以通过阻力运动期间的对流 O 供应来解释。但是，由于个体之间进行抗阻运动技能的差异，还需要进一步的研究。
