Oxygenation in vastus lateralis and lateral head of gastrocnemius during treadmill walking and running in humans
Oxygenation in vastus lateralis and lateral head of gastrocnemius during treadmill walking and running in humans
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DOI：
10.1007/s00421-002-0644-y
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发表时间：
2002-08-01
影响因子：
3
通讯作者：
Katsumura, T
中科院分区：
文献类型：
--
作者：
Hiroyuki, H;Hamaoka, T;Katsumura, T
本研究的目的是比较股外侧肌（VL）和腓肠肌外侧头（GL）的脱氧模式，并检查分级跑步机运动期间肌肉氧合水平与肺摄氧量（（V）over dotO（2））之间的关系。使用近红外光谱（NIRS）测量每块肌肉中氧合的变化。8名健康男性受试者参加了本研究。将两个NIRS探头放置在VL和GL上，然后在所有受试者中闭塞腿部动脉以使NIR信号正常化。然后，受试者以4公里的速度行走。h（-1）和6 km（.）h（-1），然后以8 km（.）h（-1）至16 km（.）h（-1）。肌肉氧合水平定义为静息时为100%，闭塞期间为最低值0%。使用间接量热法测量肺（V）/dotO（2）。在受试者开始行走后，VL中的肌肉氧合增加并超过休息时的水平。此后，两块肌肉中的肌肉氧合随着速度的增加而降低（P < 0.001）。在10 km的速度下，VL和GL之间的肌肉氧合水平存在显着差异。h（-1）和12 km（.）h（-1）（P < 0.05）。在16公里处的肌肉氧合水平。h（-1）[平均值（SEM）]在VL中为51.9（4.6）%，在GL中为52.8（3.6）%。肺动脉压（V）/dotO（2）与肌氧合呈负相关（VL：r = -0.803 ~-0.986; GL：r = -0.848 ~-0.963，P < 0.05）。我们得出结论，VL和GL之间的脱氧模式有些不同，肌肉氧合水平与肺（V）的相关性大于dotO（2）。
The purposes of this study were to compare the deoxygenation patterns of the vastus lateralis (VL) and the lateral head of gastrocnemius (GL) and examine the relationship between the muscle oxygenation level and pulmonary oxygen uptake ((V)over dotO(2)) during graded treadmill exercise. Changes in oxygenation in each muscle were measured using near infrared spectroscopy (NIRS). Eight healthy male subjects participated in this study. Two NIRS probes were placed on VL and GL, and thereafter the leg arteries were occluded in all subjects to enable normalization of the NIR signals. The subjects then walked at 4 km(.)h(-1) and 6 km(.)h(-1), and then ran continuously at speeds ranging from 8 km(.)h(-1) to 16 km(.)h(-1). The muscle oxygenation level was defined as being 100% at rest and 0% at its lowest value during occlusion. Pulmonary (V)over dotO(2) was measured using indirect calorimetry. After the subjects had started walking, the muscle oxygenation in VL increased and exceeded the level at rest. Thereafter, the muscle oxygenation in both muscles decreased in relation to the increase in speed (P < 0.001). A significant difference in the level of muscle oxygenation between VL and GL was found at speeds of 10 km(.)h(-1) and 12 km(.)h(-1) (P < 0.05). The muscle oxygenation level at 16 km(.)h(-1) was [mean (SEM)] 51.9 (4.6)% in VL and 52.8 (3.6)% in GL. There was a negative relationship between pulmonary (V)over dotO(2) and the muscle oxygenation level (VL: r = -0.803 to -0.986; GL: r = -0.848 to -0.963, P < 0.05). We concluded that the pattern of deoxygenation between VL and GL was somewhat different and that the muscle oxygenation level was associated with pulmonary (V)over dotO(2).