Wavelet analysis of lumbar muscle oxygenation signals during whole-body vibration: implications for the development of localized muscle fatigue

2012 ◽  
Vol 112 (8) ◽  
pp. 3109-3117 ◽  
Author(s):  
Zengyong Li ◽  
Ming Zhang ◽  
Guoqiang Chen ◽  
Site Luo ◽  
Feifei Liu ◽  
...  
Keyword(s):  
Wavelet Analysis ◽  
Muscle Fatigue ◽  
Whole Body Vibration ◽  
Muscle Oxygenation ◽  
Whole Body ◽  
Body Vibration ◽  
Localized Muscle Fatigue ◽  
Lumbar Muscle

Influence of seat lumbar support adjustment on muscle fatigue under whole body vibration: An in vivo experimental study

2021 ◽  
pp. 1-13
Author(s):  
Li-Xin Guo ◽  
Rui-Chun Dong ◽  
Sheng Yuan ◽  
Qing-Zhi Feng ◽  
Wei Fan
Keyword(s):  
Muscle Fatigue ◽  
Muscle Activation ◽  
Whole Body Vibration ◽  
Whole Body ◽  
Lumbar Support ◽  
Body Vibration ◽  
Activation Level ◽  
Lumbar Muscle ◽  
Support Conditions ◽  
Small Support

BACKGROUND: In order to alleviate muscle fatigue and improve ride comfort, many published studies aimed to improve the seat environment or optimize seating posture. However, the effect of lumbar support on the lumbar muscle of seated subjects under whole body vibration is still unclear. OBJECTIVE: This study aimed to investigate the effect of lumbar support magnitude of the seat on lumbar muscle fatigue relief under whole body vibration. METHODS: Twenty healthy volunteers without low back pain participated in the experiment. By measuring surface electromyographic signals of erector spinae muscles under vibration or non-vibration for 30 minutes, the effect of different lumbar support conditions on muscle fatigue was analyzed. The magnitude of lumbar support d is assigned as d1= 0 mm, d2= 20 mm and d3= 40 mm for no support, small support and large support, respectively. RESULTS: The results showed that lumbar muscle activation levels vary under different support conditions. For the small support case (d2= 20 mm), the muscle activation level under vibration and no-vibration was the minimum, 42.3% and 77.7% of that under no support (d1= 0 mm). For all support conditions, the muscle activation level under vibration is higher than that under no-vibration. CONCLUSIONS: The results indicate that the small support yields the minimum muscle contraction (low muscle contraction intensity) under vibration, which is more helpful for relieving lumbar muscle fatigue than no support or large support cases. Therefore, an appropriate lumbar support of seats is necessary for alleviating lumbar muscle fatigue.

scholarly journals Whole-Body Vibration and Blood Flow and Muscle Oxygenation: A Meta-Analysis

2015 ◽  
Vol 50 (5) ◽  
pp. 542-549 ◽  
Author(s):  
Kenneth E. Games ◽  
JoEllen M. Sefton ◽  
Alan E. Wilson
Keyword(s):  
Blood Flow ◽  
Peripheral Blood ◽  
Meta Analysis ◽  
Whole Body Vibration ◽  
Muscle Oxygenation ◽  
Whole Body ◽  
Peripheral Blood Flow ◽  
Body Vibration ◽  
Meta Analyses ◽  
Key Terms

Context The use and popularity of whole-body vibration (WBV) has increased in recent years, but there is a lack of consensus in the literature about the effectiveness of the treatment. Objective To quantitatively examine the effects of WBV on muscle oxygenation and peripheral blood flow in healthy adults. Data Sources We searched Web of Science and PubMed databases and reference lists from relevant articles using the key terms whole body vibration, whole-body vibration, WBV, blood flow, peripheral blood flow, oxygenation, muscle oxygenation, circulation, circulatory, near infrared spectroscopy, NIRS, and power Doppler. Key terms were searched using single word and combination searches. No date range was specified. Study Selection Criteria for inclusion were (1) use of a commercially available WBV device, (2) a human research model, (3) a pre-WBV condition and at least 1 WBV experimental condition, and (4) reporting of unstandardized means and standard deviations of muscle oxygenation or peripheral blood flow. Data Extraction Means, standard deviations, and sample sizes were extracted from the text, tables, and figures of included studies. A total of 35 and 90 data points were extracted for the muscle-oxygenation and blood-flow meta-analyses, respectively. Data for each meta-analysis were combined and analyzed using meta-analysis software. Weighted, random-effects meta-analyses using the Hedges g metric were completed for muscle oxygenation and blood flow. We then conducted follow-up analyses using the moderator variables of vibration type, vibration time, vibration frequency, measurement location, and sample type. Data Synthesis We found 18 potential articles. Further examination yielded 10 studies meeting the inclusion criteria. Whole-body vibration was shown to positively influence peripheral blood flow. Additionally, the moderators of vibration type and frequency altered the influence of WBV on blood flow. Overall, WBV did not alter muscle oxygenation; however, when the measurement site was considered, muscle oxygenation increased or decreased depending on the location. Conclusions Acute bouts of WBV increase peripheral blood flow but do not alter skeletal muscle oxygenation. Vibration type appears to be the most important factor influencing both muscle oxygenation and peripheral blood flow.

Countermeasures against lumbar spine deconditioning in prolonged bed rest: resistive exercise with and without whole body vibration

2010 ◽  
Vol 109 (6) ◽  
pp. 1801-1811 ◽  
Author(s):  
Daniel L. Belavý ◽  
Gabriele Armbrecht ◽  
Ulf Gast ◽  
Carolyn A. Richardson ◽  
Julie A. Hides ◽  
...  
Keyword(s):  
Whole Body Vibration ◽  
Bed Rest ◽  
Magnetic Resonance Images ◽  
Erector Spinae ◽  
Whole Body ◽  
Resistive Exercise ◽  
Body Vibration ◽  
Vibration Exercise ◽  
Quadratus Lumborum ◽  
Lumbar Muscle

To evaluate the effect of short-duration, high-load resistive exercise, with and without whole body vibration on lumbar muscle size, intervertebral disk and spinal morphology changes, and low back pain (LBP) incidence during prolonged bed rest, 24 subjects underwent 60 days of head-down tilt bed rest and performed either resistive vibration exercise ( n = 7), resistive exercise only ( n = 8), or no exercise ( n = 9; 2nd Berlin Bed-Rest Study). Discal and spinal shape was measured from sagittal plane magnetic resonance images. Cross-sectional areas (CSAs) of the multifidus, erector spinae, quadratus lumborum, and psoas were measured on para-axial magnetic resonance images. LBP incidence was assessed with questionnaires at regular intervals. The countermeasures reduced CSA loss in the multifidus, lumbar erector spinae and quadratus lumborum muscles, with greater increases in psoas muscle CSA seen in the countermeasure groups ( P ≤ 0.004). There was little statistical evidence for an additional effect of whole body vibration above resistive exercise alone on these muscle changes. Exercise subjects reported LBP more frequently in the first week of bed rest, but this was only significant in resistive exercise only ( P = 0.011 vs. control, resistive vibration exercise vs. control: P = 0.56). No effect of the countermeasures on changes in spinal morphology was seen ( P ≥ 0.22). The results suggest that high-load resistive exercise, with or without whole body vibration, performed 3 days/wk can reduce lumbar muscle atrophy, but further countermeasure optimization is required.

Neck/Shoulder Muscle Fatigue of Military Vehicle Drivers Exposed to Whole-Body Vibration on Field Terrain Road

2020 ◽  
Vol 21 (1) ◽  
pp. 115-121 ◽  
Author(s):  
Dong Jun Park ◽  
Jun Woo Lee ◽  
Jin Han Park ◽  
Jong Tak Song ◽  
Se Jin Ahn ◽  
...  
Keyword(s):  
Muscle Fatigue ◽  
Whole Body Vibration ◽  
Whole Body ◽  
Body Vibration ◽  
Shoulder Muscle ◽  
Military Vehicle
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