Electromyographic activity of back muscles during stochastic whole body vibration.

Blasimann Schwarz, Angela; Fleuti, U.; Rufener, M.; Elfering, A.; Radlinger, Lorenz (2014). Electromyographic activity of back muscles during stochastic whole body vibration. Journal of Musculoskeletal & Neuronal Interactions, 14(3), pp. 311-317. International Society of Musculoskeletal and Neuronal Interactions

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Objectives: Stochastic resonance whole body vibrations (SR-WBV) may reduce and prevent musculoskeletal problems (MSP). The aim of this study was to evaluate how activities of the lumbar erector spinae (ES) and of the ascending and descending trapezius (TA, TD) change in upright standing position during SR-WBV. Methods: Nineteen female subjects completed 12 series of 10 seconds of SR-WBV at six different frequencies (2, 4, 6, 8, 10, 12Hz) and two types of “noise”-applications. An assessment at rest had been executed beforehand. Muscle activities were measured with EMG and normalized to the maximum voluntary contraction (MVC%). For statistical testing a three-factorial analysis of variation (ANOVA) was applied. Results: The maximum activity of the respective muscles was 14.5 MVC% for the ES, 4.6 MVC% for the TA (12Hz with “noise” both), and 7.4 MVC% for the TD (10Hz without “noise”). Furthermore, all muscles varied significantly at 6Hz and above (p≤0.047) compared to the situation at rest. No significant differences were found at SR-WBV with or without “noise“. Conclusions: In general, muscle activity during SR-WBV is reasonably low and comparable to core strength stability exercises, sensorimotor training and “abdominal hollowing” in water. SR-WBV may be a therapeutic option for the relief of MSP.

Item Type:	Journal Article (Original Article)
Division/Institute:	School of Health Professions
Name:	Blasimann Schwarz, Angela0000-0003-0934-8284; Fleuti, U.; Rufener, M.; Elfering, A. and Radlinger, Lorenz0000-0002-0326-6264
ISSN:	1108-7161
Publisher:	International Society of Musculoskeletal and Neuronal Interactions
Language:	English
Submitter:	Service Account
Date Deposited:	27 Jan 2020 10:27
Last Modified:	18 Dec 2020 13:27
ARBOR DOI:	10.24451/arbor.5693
URI:	https://arbor.bfh.ch/id/eprint/5693