Simulation of surface EMG for the analysis of muscle activity during whole body vibratory stimulation

Fratini, Antonio; Bifulco, Paolo; Romano, Maria; Clemente, Fabrizio; Cesarelli, Mario

doi:10.1016/j.cmpb.2013.10.009

Cited by 16 publications

(7 citation statements)

References 35 publications

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“…Vibrations are transmitted through the kinematic chain of the body; the combination of frequency, amplitude of the stimulus, subject posture and vibration delivery design can dramatically change the actual stimulus at the target site [10, 11]. …”

Section: Introductionmentioning

confidence: 99%

Whole Body Vibration Treatments in Postmenopausal Women Can Improve Bone Mineral Density: Results of a Stimulus Focussed Meta-Analysis

2016

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Whole body vibration treatment is a non-pharmacological intervention intended to stimulate muscular response and increase bone mineral density, particularly for postmenopausal women. The literature related to this topic is controversial, heterogeneous, and unclear despite the prospect of a major clinical effect.The aim of this study was to identify and systematically review the literature to assess the effect of whole body vibration treatments on bone mineral density (BMD) in postmenopausal women with a specific focus on the experimental factors that influence the stimulus. Nine studies fulfilled the inclusion criteria, including 527 postmenopausal women and different vibration delivery designs. Cumulative dose, amplitudes and frequency of treatments as well as subject posture during treatment vary widely among studies. Some of the studies included an associated exercise training regime. Both randomized and controlled clinical trials were included. Whole body vibration was shown to produce significant BMD improvements on the hip and spine when compared to no intervention. Conversely, treatment associated with exercise training resulted in negligible outcomes when compared to exercise training or to placebo. Moreover, side-alternating platforms were more effective in improving BMD values than synchronous platforms and mechanical oscillations of magnitude higher than 3 g and/or frequency lower than 25 Hz were also found to be effective. Treatments with a cumulative dose over 1000 minutes in the follow-up period were correlated to positive outcomes.Our conclusion is that whole body vibration treatments in elderly women can reduce BMD decline.However, many factors (e.g., amplitude, frequency and subject posture) affect the capacity of the vibrations to propagate to the target site; the adequate level of stimulation required to produce these effects has not yet been defined. Further biomechanical analyses to predict the propagation of the vibration waves along the body and assess the stimulation levels are required.

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Section: Introductionmentioning

confidence: 99%

Whole Body Vibration Treatments in Postmenopausal Women Can Improve Bone Mineral Density: Results of a Stimulus Focussed Meta-Analysis

2016

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“…Surface electromyography (sEMG) is the sum of the action potentials generated by the active motor units recorded by electrodes placed on the skin overlying the muscles [3]. It is dependent on numerous factors such as the rate of stimulation of the muscle, size of motor units recruited, morphology of the motor units, electrical properties of the tissues and the presence of any synchronization of the activity of different motor units.…”

Section: Introductionmentioning

confidence: 99%

The sEMG characteristics of the low back muscles during aerobic cycling

Xiao

Gao

Wang

et al. 2014

Bio-Medical Materials and Engineering

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More and more people suffer from lumbar muscle strain due to lack of exercise. Cycling serves as both a stylish model of fitness and a training method in exercise and rehabilitation. A few of previous studies have examined the changes in lower extremity muscle activities during indoor cycling, but fewer data pertain to the low back muscles. This study aims to analyze the functional status of erector spinae during cycling by learning the regularity and characteristics of changes in sEMG frequency domain index-mean frequency (MF) within ten minutes. The statistical results showed that the values of 70% subjects fluctuated within the range of (0.04688±0.00125) Hz within the first 30 s and the values raised rapidly to the (150±10) Hz range after the 30 s. Moreover, the values trended to decline slowly in a fluctuating way after a while. However, no obvious regularity was observed among the remaining 30% of the subjects. Results of this study demonstrated that the muscle fatigue with a smaller level of low back began to emerge gradually after 30 s. Moreover, it is evident that cycling can be an incentive to the low back muscles in most people.

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“…Seven vibration frequencies were analyzed (12,(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)5 Hz). Each recording session consisted in twenty seconds of vibratory stimulation preceded by ten second without stimulation.…”

Section: Stimulation Protocolmentioning

confidence: 99%

“…These alterations could generate electrical voltages at recording site (up to 5-10 mV), which add to the EMG as peculiar artifacts named motion artifacts. Motion artifacts are clearly visible in the spectrum of EMG recordings, but not always in the typical interference patterns of surface EMG recordings [9,11].…”

Section: Introductionmentioning

confidence: 99%

“…The extent of the vibration efficacy is commonly evaluated by means of surface electromyography (EMG) analysis in muscles under stimulation. Vibrations, however, not only result in the undoubting muscle stimulation, but also produce disturbances of the electrochemical potentials at electrode/electrolyte/skin and skin layers/tissues interfaces [6][7][8][9][10][11]. These alterations could generate electrical voltages at recording site (up to 5-10 mV), which add to the EMG as peculiar artifacts named motion artifacts.…”

Section: Introductionmentioning

confidence: 99%

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Application of Ensemble Averaging to the Analysis of Electromyography Recordings under Whole Body Vibratory Stimulation

Fratini¹,

Bifulco²,

Cesarelli³

2014

2014 IEEE 27th International Symposium on Computer-Based Medical Systems

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The aim of this study is to evaluate the application of ensemble averaging to the analysis of electromyography recordings under whole body vibratory stimulation. Recordings from Rectus Femoris, collected during vibratory stimulation at different frequencies, are used. Each signal is subdivided in intervals, which time duration is related to the vibration frequency. Finally the average of the segmented intervals is performed. By using this method for the majority of the recordings the periodic components emerge. The autocorrelation of few seconds of signals confirms the presence of a pseudosinusoidal components strictly related to the soft tissues oscillations caused by the mechanical waves.

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Simulation of surface EMG for the analysis of muscle activity during whole body vibratory stimulation

Cited by 16 publications

References 35 publications

Whole Body Vibration Treatments in Postmenopausal Women Can Improve Bone Mineral Density: Results of a Stimulus Focussed Meta-Analysis

Whole Body Vibration Treatments in Postmenopausal Women Can Improve Bone Mineral Density: Results of a Stimulus Focussed Meta-Analysis

The sEMG characteristics of the low back muscles during aerobic cycling

Application of Ensemble Averaging to the Analysis of Electromyography Recordings under Whole Body Vibratory Stimulation

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