Effects of Vibrations on Gastrocnemius Medialis Tissue Oxygenation
Effects of Vibrations on Gastrocnemius Medialis Tissue Oxygenation
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DOI：
10.1249/mss.0b013e3181f2589f
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发表时间：
2011-03-01
期刊：
影响因子：
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通讯作者：
Dunn, Jeff F.
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文献类型：
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作者：
Coza, Aurel;Nigg, Benno M.;Dunn, Jeff F.
COZA， A.， B. M. NIGG， J. F. DUNN。振动对腓肠肌内肌组织氧合的影响。医学科学。体育Exerc。，第43卷第3期，第509-515页，2011年。目的：众所周知，全身振动会影响肌肉活动和组织氧合，但一些能量方面仍然知之甚少。研究了运动时全身振动对腓肠肌氧利用率和组织氧动力学的影响。方法：选取年龄为26.3 +/- 5.1岁，体重为71.2 +/- 4.8 kg （mean +/- SD）的活跃男性16例进行动态运动，研究振动对腓肠肌内肌氧合的影响。研究了动脉闭塞（AO）和非闭塞（N/O）两种情况。用近红外光谱仪监测组织氧合。氧利用率和组织氧恢复分别作为氧衰变和氧恢复回归线的斜率。利用快速傅里叶变换（FFT）确定了氧饱和度数据的频谱。用双极肌电图电极监测肌电活动。采用加窗均方根分析监测肌电信号的振幅。结果：振动条件下AO组氧利用率提高15% (P < 0.05)， N/O组无显著差异。振动条件下氧合回收率比对照组高34% （P < 0.05）。从FFT谱中确定了组织氧合数据的低频周期振荡（T约为10 s）。与控制相比，振动条件下的振荡频率在统计上显着降低。结论：振动提高了动态运动时的氧气利用率。随着振动的增加，氧合回收率增加。氧合的低频振荡归因于组织血流的周期性变化，而这似乎受到振动的影响。
COZA, A., B. M. NIGG, and J. F. DUNN. Effects of Vibrations on Gastrocnemius Medialis Tissue Oxygenation. Med. Sci. Sports Exerc., Vol. 43, No. 3, pp. 509-515, 2011. Purpose: Whole-body vibrations are known to affect muscle activity and tissue oxygenation, but some energetic aspects are still poorly understood. This study investigates the effects of whole-body vibration on gastrocnemius muscle oxygen utilization rate and tissue oxygenation dynamics during exercise. Methods: The effects of vibration on gastrocnemius medialis muscle oxygenation were investigated during a dynamic exercise on a sample of 16 active male subjects (age = 26.3 +/- 5.1 yr, mass = 71.2 +/- 4.8 kg (mean +/- SD)). Both arterially occluded (AO) and nonoccluded (N/O) conditions were investigated. Tissue oxygenation was monitored with a near-infrared spectrometer. Oxygen utilization rate and tissue oxygenation recovery were computed as the slopes of the regression line of the oxygenation decay and recovery, respectively. A fast Fourier transform (FFT) was used to determine the frequency spectrum of the oxygen saturation data. EMG activity was monitored using bipolar EMG electrodes. A windowed root mean square analysis was used to monitor the amplitude of the EMG signal. Results: A statistically significant increase of 15% (P < 0.05) in oxygen utilization rate was found for the vibration condition in the AO leg but not in the N/O leg. The oxygenation recovery rate for the vibration condition was 34% higher (P < 0.05) than that for the control condition. A low-frequency periodic oscillation (T approximate to 10 s) in the tissue oxygenation data was determined from the FFT spectrum. A statistically significant decrease in the oscillation frequency was noticed for the vibration condition compared with the control. Conclusions: Vibrations increased the oxygen utilization rate during a dynamic exercise. The oxygenation recovery rate increased with vibrations. The low-frequency oscillation of the oxygenation was attributed to the periodic changes in tissue blood flow, and this seems to be influenced by vibrations.