Effect of whole body vibration on the electromyographic activity of core stabilizer muscles

Background Indirect vibration stimulation, i.e., whole body vibration or upper limb vibration, has been investigated increasingly as an exercise intervention for rehabilitation applications. However, there is a lack of evidence regarding the effects of graded isometric contractions superimposed on whole body vibration stimulation. Hence, the objective of this study was to quantify and analyse the effects of variations in the vibration parameters and contraction levels on the neuromuscular responses to isometric exercise superimposed on whole body vibration stimulation. Methods In this study, we assessed the ‘neuromuscular effects’ of graded isometric contractions, of 20%, 40%, 60%, 80% and 100% of maximum voluntary contraction, superimposed on whole body vibration stimulation (V) and control (C), i.e., no-vibration in 12 healthy volunteers. Vibration stimuli tested were 30 Hz and 50 Hz frequencies and 0.5 mm and 1.5 mm amplitude. Surface electromyographic activity of the vastus lateralis, vastus medialis and biceps femoris were measured during V and C conditions with electromyographic root mean square and electromyographic mean frequency values used to quantify muscle activity and their fatigue levels, respectively. Results Both the prime mover (vastus lateralis) and the antagonist (biceps femoris) displayed significantly higher (P < 0.05) electromyographic activity with the V than the C condition with varying percentage increases in EMG root-mean-square (EMGrms) values ranging from 20% to 200%. For both the vastus lateralis and biceps femoris, the increase in mean EMGrms values depended on the frequency, amplitude and muscle contraction level with 50 Hz–0.5 mm stimulation inducing the largest neuromuscular activity. Conclusions These results show that the isometric contraction superimposed on vibration stimulation leads to higher neuromuscular activity compared to isometric contraction alone in the lower limbs. The combination of the vibration frequency with the amplitude and the muscle tension together grades the final neuromuscular output.

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Individualized Whole-Body Vibration: Neuromuscular, Biochemical, Muscle Damage and Inflammatory Acute Responses

Dose-Response ◽

10.1177/1559325820931262 ◽

2020 ◽

Vol 18 (2) ◽

pp. 155932582093126

Author(s):

Riccardo Di Giminiani ◽

Nadia Rucci ◽

Lorenzo Capuano ◽

Marco Ponzetti ◽

Federica Aielli ◽

...

Keyword(s):

Muscle Damage ◽

Repeated Measures ◽

Whole Body Vibration ◽

Voluntary Contraction ◽

Whole Body ◽

Electromyographic Activity ◽

Double Blind ◽

Body Vibration ◽

Neuromuscular Responses ◽

Over Time

Objective. We aimed to investigate the acute residual hormonal, biochemical, and neuromuscular responses to a single session of individualized whole-body vibration (WBV) while maintaining a half-squat position. Methods. Twenty male sport science students voluntarily participated in the present study and were randomly assigned to an individualized WBV group (with the acceleration load determined for each participant) or an isometric group (ISOM). A double-blind, controlled parallel study design with repeated measures was employed. Results. Testosterone and growth hormone increased significantly over time in the WBV group ( P < .05 and P < .01, respectively; effect size [ES] ranged from 1.00 to 1.23), whereas cortisol increased over time in both groups ( P < .01; ES ranged from 1.04 and 1.36). Interleukin-6 and creatine kinase increased significantly over time only in the WBV group ( P < .05; ES = 1.07). The maximal voluntary contraction decreased significantly over time in the ISOM group ( P = .019; ES = 0.42), whereas in the WBV group, the decrease did not reach a significant level ( P = .05). The ratio of electromyographic activity and power decreased significantly over time in the WBV group ( P < .01; ES ranged from 0.57 to 0.72). Conclusion. Individualized WBV increased serum hormonal concentrations, muscle damage, and inflammation to levels similar to those induced by resistance training and hypertrophy exercises.

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Effects of combined whole body vibration and resistance training on lower quadrants electromyographic activity, muscle strength and power in athletes

The Foot ◽

10.1016/j.foot.2021.101844 ◽

2021 ◽

pp. 101844

Author(s):

Nitin Kumar Arora ◽

Saurabh Sharma ◽

Sana Saifi ◽

Shalini Sharma ◽

Ishant Kumar Arora

Keyword(s):

Resistance Training ◽

Muscle Strength ◽

Whole Body Vibration ◽

Whole Body ◽

Electromyographic Activity ◽

Body Vibration

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Whole-Body Vibration for Individuals with Reconstructed Anterior Cruciate Ligament: A Systematic Review

BioMed Research International ◽

10.1155/2020/7362069 ◽

2020 ◽

Vol 2020 ◽

pp. 1-14 ◽

Cited By ~ 1

Author(s):

Adérito Seixas ◽

Borja Sañudo ◽

Danúbia Sá-Caputo ◽

Redha Taiar ◽

Mário Bernardo-Filho

Keyword(s):

Systematic Review ◽

Anterior Cruciate Ligament ◽

Cruciate Ligament ◽

Whole Body Vibration ◽

Knee Function ◽

Whole Body ◽

Electromyographic Activity ◽

Body Vibration ◽

Positive Effects ◽

Anterior Cruciate

Background. ACL ruptures are a prevalent condition, affecting daily living activities, associated with high financial burden. Objective. To assess the effect of whole-body vibration (WBV) in the rehabilitation of patients with reconstructed anterior cruciate ligament. Methodology. An electronic search in Pubmed, Scopus, Web of Science, and PEDro databases was conducted and randomized controlled trials (RCTs) in humans that analysed the effects of WBV in patients with ACL injury subjected to reconstruction surgery, published in English, Portuguese, Spanish, Italian, or French were included. Records were identified through database search and reference screening by two reviewers, which independently examined titles and abstracts and irrelevant studies were excluded based in eligibility criteria. Relevant full texts were analysed for eligibility, and all relevant studies were included in the systematic review. Results. Ten studies were included in the systematic review with a mean methodological quality score of 6. Results demonstrate positive effects of WBV in relevant outcomes such as knee function, electromyographic activity, balance, and muscle strength. Conclusions. WBV demonstrated a positive effect in strength, balance, electromyographic activity, and knee function.

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