Accelerated point of muscle deoxygenation during the 20‐m shuttle run test
Accelerated point of muscle deoxygenation during the 20‐m shuttle run test
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20米往返跑测试中肌肉脱氧加速点
DOI：
10.1111/cpf.12426
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发表时间：
2018
影响因子：
1.8
通讯作者：
H. Endoh
中科院分区：
文献类型：
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作者：
Daisuke Kume;A. Iguchi;H. Endoh
本研究考察了在20米穿梭跑试验（20mSRT）中活动肌肉加速脱氧点是否出现，如果出现，是否与试验中的运动表现有关。29名男性受试者进行了20mSRT，并使用便携式近红外光谱装置测量股外侧肌中氧合血红蛋白（ΔOxy‐Hb）和脱氧血红蛋白（ΔDeoxy‐Hb）的浓度变化。将ΔOxy‐Hb与ΔDeoxy‐Hb （Δ[Oxy‐Hb - Deoxy‐Hb]）的相对浓度变化之差作为肌肉氧合指数。组平均Δ[Oxy‐Hb - Deoxy‐Hb]在测试期间呈渐进式下降。然而，在个体中，我们发现20名受试者中Δ[Oxy‐Hb−Deoxy‐Hb]存在加速下降点，这表明加速点处的圈数与总圈数相关（r = 0.78）。这些结果表明，活动肌肉的加速脱氧发生在20mSRT期间，但并非所有病例都如此。我们的研究结果还表明，如果肌肉缺氧加速点发生，其出现的时间与20mSRT的表现有关。
This study examined whether the point of accelerated deoxygenation of active muscle occurs during the 20‐m shuttle run test (20mSRT) and, if so, whether it is associated with exercise performance in the test. Twenty‐nine male subjects performed the 20mSRT, and concentration changes in oxyhaemoglobin (ΔOxy‐Hb) and deoxyhaemoglobin (ΔDeoxy‐Hb) in the m. vastus lateralis were measured using a portable near‐infrared spectroscopy device. The difference between the relative concentration changes in ΔOxy‐Hb and ΔDeoxy‐Hb (Δ[Oxy‐Hb − Deoxy‐Hb]) was regarded as the muscle oxygenation index. Group‐averaged Δ[Oxy‐Hb − Deoxy‐Hb] showed progressive decrease during the test. However, among the individuals, we found an accelerated point of decrease in Δ[Oxy‐Hb − Deoxy‐Hb] in 20 subjects, which revealed that the laps at the accelerated point correlated with the total laps (r = 0·78). These results demonstrate that the accelerated deoxygenation of active muscle occurs during the 20mSRT, but not in all cases. Our findings also indicate that if the accelerated point of muscle deoxygenation occurs, the timing of its appearance is related to 20mSRT performance.