The effects of lumbar massage on muscle fatigue, muscle oxygenation, low back discomfort, and driver performance during prolonged driving
The effects of lumbar massage on muscle fatigue, muscle oxygenation, low back discomfort, and driver performance during prolonged driving
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DOI：
10.1080/00140130500356882
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发表时间：
2006-01-15
期刊：
影响因子：
2.4
通讯作者：
Callaghan, JP
中科院分区：
文献类型：
--
作者：
Durkin, JL;Harvey, A;Callaghan, JP
社会对汽车的依赖性越来越大，无论是工作还是休闲，坐在车里的时间也相应增加，这与腰痛和缺勤的风险增加有关（Porter和Gyi 2002）。本研究在1小时模拟驾驶任务中考察了三种类型的腰部按摩装置对座椅舒适度、肌肉疲劳、肌肉氧合、肌肉血流量和驾驶性能的影响。从右侧和左侧胸和腰竖脊肌肌肉组织记录肌电图（EMG）信号。平均肌电图（AEMG），平均功率频率（MPF），间隙和幅度概率分布函数（APDF）参数进行了分析，从三个按摩座椅，并与对照座椅。近红外光谱（NIRS）和皮肤温度从右胸和腰竖脊肌被用来作为肌肉氧合和血流量在整个驾驶任务的指示。感知不适的评级被用来评估驾驶员的不适，并通过计算每个驾驶试验持续时间的平均单圈时间来评估驾驶性能。结果显示，驾驶60分钟后，与对照座椅相比，皮肤温度在统计学上显著增加。NIRS结果反映了这些趋势，尽管结果在统计学上不显著。AEMG和MPF测量显示座位之间没有显着差异。MPF测量被发现随着时间的推移而增加，其影响归因于肌肉温度的增加。间隙和APDF分析显示，更大的休息时间和较低的激活水平，分别与控制座椅，这可能会导致被动结构的负载增加。这项研究证明了腰椎按摩系统在增加肌肉血流量和氧合方面的有益效果。虽然EMG参数没有显著差异，但趋势支持显著的血流量结果。未来的研究应包括更长的驾驶时间和调整EMG措施，以考虑到肌肉温度升高对AEMG和MPF措施的影响。
An increasing dependence of society on automobiles for both work and leisure and the corresponding increase in time spent seated in the car has been correlated with a greater risk of low back pain and absence from work (Porter and Gyi 2002). This study examined the effects of three types of lumbar massage units on seating comfort, muscle fatigue, muscle oxygenation, muscle blood flow and driving performance during a 1 h simulated driving task. Electromyographic (EMG) signals were recorded from the right and left thoracic and lumbar erector spinae musculature. Average EMG (AEMG), mean power frequency (MPF), gaps and amplitude probability distribution function (APDF) parameters were analysed from the three massage seats and compared to a control seat. Near infrared spectroscopy (NIRS) and skin temperature from the right thoracic and lumbar erector spinae were used as an indication of muscle oxygenation and blood flow throughout the driving task. Ratings of perceived discomfort were used to assess driver discomfort, and driving performance was assessed by calculating mean lap times for the duration of each driving trial. The results showed statistically significant increases in skin temperature compared with the control seat after 60 min of driving. The NIRS results reflected these trends although the results were not statistically significant. AEMG and MPF measures showed no significant differences between the seats. MPF measures were found to increase over time, effects attributed to increases in muscle temperature. Gaps and APDF analyses revealed greater rest times and lower activation levels, respectively, with the control seat, which could result in increased loading of passive structures. This study demonstrated the beneficial effects of lumbar massage systems in increasing muscle blood flow and oxygenation. Although EMG parameters were not significantly different, the trends support the significant blood flow results. Future research should include longer driving times and adjustments in EMG measures to account for the effects of increasing muscle temperature on AEMG and MPF measures.