Asymmetry of Quadriceps Muscle Oxygenation during Elite Short-Track Speed Skating
Asymmetry of Quadriceps Muscle Oxygenation during Elite Short-Track Speed Skating
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DOI：
10.1249/mss.0b013e31822f8942
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发表时间：
2012-03-01
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影响因子：
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通讯作者：
Cooper, Chris E.
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文献类型：
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作者：
Hesford, Catherine Mary;Laing, Stewart J.;Cooper, Chris E.
书名/作者声明/作者声明：//C.C.优秀短道速滑中股四头肌的氧合不对称性。地中海医院。SCI。《体育运动》，第44卷，第3期，第501-508页，2012年。目的：短道速滑由于坐姿较低，肌肉血流受限，导致组织氧合功能下降。因此，可穿戴式无线近红外光谱(NIRS)技术被用来监测短道速滑运动员在500米比赛模拟过程中股四头肌肌肉血容量和氧合的变化。方法：对6名优秀滑冰运动员(年龄23±1.8岁，身高1.8±0.1m，体重80.1±5.7 kg，大腿中段皮褶厚度7±2 mm)进行研究。受试者完成了500米模拟计时赛(TT)。采用近红外光谱(NIRS)同时测定左、右股外侧肌的全身氧耗量和肌肉氧合。结果：平均完赛时间为44.8+/-0.4 S。(V)超过Doto(2)进入比赛的最高成绩为20 S。线性回归分析显示，在接下来的比赛中，右腿的肌肉组织氧饱和度保持不变(斜率=0.0 1)，而左腿的肌肉组织氧饱和度稳步上升(斜率=0.16)，在最后一圈出现明显的不对称性(P<；0.0 5)。在模拟开始时，两条腿的总肌肉血容量平均减少。然而，在随后的几圈中，转弯过程中出现了强烈的不对称性；当滑冰运动员仅靠右腿行走时，其肌肉血容量减少，而左腿则增加。结论：近红外光谱是一种可行的肌肉氧合无线监测工具。在短道速滑中观察到的两条腿肌肉不饱和的不对称性对训练和表现有一定的影响。
HESFORD, C. M., S. J. LAING, M. CARDINALE, and C. E. COOPER. Asymmetry of Quadriceps Muscle Oxygenation during Elite Short-Track Speed Skating. Med. Sci. Sports Exerc., Vol. 44, No. 3, pp. 501-508, 2012. Purpose: It has been suggested that, because of the low sitting position in short-track speed skating, muscle blood flow is restricted, leading to decreases in tissue oxygenation. Therefore, wearable wireless-enabled near-infrared spectroscopy (NIRS) technology was used to monitor changes in quadriceps muscle blood volume and oxygenation during a 500-m race simulation in short-track speed skaters. Methods: Six elite skaters, all of Olympic standard (age = 23 +/- 1.8 yr, height = 1.8 +/- 0.1 m, mass = 80.1 +/- 5.7 kg, midthigh skinfold thickness = 7 +/- 2 mm), were studied. Subjects completed a 500-m race simulation time trial (TT). Whole-body oxygen consumption was simultaneously measured with muscle oxygenation in right and left vastus lateralis as measured by NIRS. Results: Mean time for race completion was 44.8 +/- 0.4 s. (V) over dotO(2) peaked 20 s into the race. In contrast, muscle tissue oxygen saturation (TSI%) decreased and plateaued after 8 s. Linear regression analysis showed that right leg TSI% remained constant throughout the rest of the TT (slope value = 0.01), whereas left leg TSI% increased steadily (slope value = 0.16), leading to a significant asymmetry (P < 0.05) in the final lap. Total muscle blood volume decreased equally in both legs at the start of the simulation. However, during subsequent laps, there was a strong asymmetry during cornering; when skaters traveled solely on the right leg, there was a decrease in its muscle blood volume, whereas an increase was seen in the left leg. Conclusions: NIRS was shown to be a viable tool for wireless monitoring of muscle oxygenation. The asymmetry in muscle desaturation observed on the two legs in short-track speed skating has implications for training and performance.