Different fatigue-resistant leg muscles and EMG response during whole-body vibration

Simsek, Deniz

doi:10.1016/j.jelekin.2017.10.006

Cited by 26 publications

(19 citation statements)

References 41 publications

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“…(1) When the force increases (amplitude and frequency increase) [33]; (2) in the fatigue state (increases the amplitude and decreases the frequency) [34]; (3) when the force decreases (amplitude and frequency decreases) [35] and (4) in the period of recovery (amplitude decreases and frequency increases) [36]. Consequently, the adoption of the methodology applied in this work confirmed several of the assumptions raised by other authors.…”

Section: Discussionsupporting

confidence: 82%

Implementation of a Portable Electromyographic Prototype for the Detection of Muscle Fatigue

2019

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Surface electromyography (sEMG) applied to the sports training area makes possible the observation of fatigue as well as the generation of muscular strength, through the study of changes in signal characteristics, such as peak-to-peak amplitude, mean frequency and median, among others. In this sense, this work presents the design of a portable prototype for the acquisition and processing of electromyographic (EMG) signals aimed at the detection of muscle fatigue in athletes. Using two Bluetooth Bee modules, a wireless communication was performed in order to send the muscular electrical activity of the skin surface to a user interface developed in LabVIEW. A group of players from the Volleyball team of the Universidad del Magdalena, performed a series of exercise routines with dynamic contractions and as they experienced fatigue, samples were taken of the contractions made. The tests were performed on the vastus lateralis and rectus femoris muscles. The analysis of fatigue under dynamic conditions of the two parameters studied, in frequency and time, showed that it is more pertinent to estimate fatigue indices in the frequency domain.

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Section: Discussionsupporting

confidence: 82%

Implementation of a Portable Electromyographic Prototype for the Detection of Muscle Fatigue

2019

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“…For example, Desai [22] reported that the activation rates (RMS% MVC) of RM, AOE, and ES in an unstable plane are significantly higher than those in a stable plane in healthy people and patients with low back pain. Simsek [23] designed an experiment to verify the effects of vertical WBV on the EMG signal responses of leg muscle activities and showed a high-percentage increase in EMG activation at high frequencies (maximum of 40 Hz) and amplitude (4 mm; p < 0.05). Muscles usually need to use more energy to maintain balance in an unstable plane, and the RMSs of EMG increase [24,25].…”

Section: Discussionmentioning

confidence: 99%

Effects of Whole-Body Vibration on Lumbar-Abdominal Muscles Activation in Healthy Young Adults: A Pilot Study

et al. 2019

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BackgroundThis study investigated how whole-body vibration (WBV), exercise, and their interactions influence core muscle activity in healthy young adults.Material/MethodsTwenty-three healthy young adults (8 males and 15 females; age: 21.87±2.33 years) participated in the study. The activities of muscle multifidi (MM), rectus abdominis muscle (RM), erector spinae (ES), abdominis obliquus externus (AOE), and abdominis obliquus internus (AOI) were measured through surface electromyography (sEMG) while participants were performing 4 different exercise forms under 3 WBV conditions (condition 1: 5 Hz, 2 mm; condition 2: 10 Hz, 2 mm; and condition 3: 15 Hz, 2 mm) and a no-WBV condition in single experimental sessions.ResultThe WBV frequency of 15 Hz is the best vibration stimulation for core muscles in all of the exercises (P<0.05). Single bridge is a better exercise for RM and AOE (P<0.05) compared with other exercises, and crunches is the best exercise for MM, AOI, and ES (P<0.05). Significant interaction effect was observed in different frequencies and exercises (P>0.05) except for AOI (F=0.990, P=0.378).ConclusionsHigh vibration frequencies can lead to enhanced exercise benefits within an appropriate frequency range, and different exercises have diverse effects on various muscles. Single bridge and crunches are appropriate exercise forms for lumbar-abdominal muscles.

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“…Its features are summarised in Table 4. This equipment is used by a wide range of studies [39,40,41,42] because of its high accuracy and the powerful software.…”

Section: Methodsmentioning

confidence: 99%

Validation of a Low-Cost Electromyography (EMG) System via a Commercial and Accurate EMG Device: Pilot Study

Toro

Wei

Olmeda

et al. 2019

Sensors

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Electromyography (EMG) devices are well-suited for measuring the behaviour of muscles during an exercise or a task, and are widely used in many different research areas. Their disadvantage is that commercial systems are expensive. We designed a low-cost EMG system with enough accuracy and reliability to be used in a wide range of possible ways. The present article focuses on the validation of the low-cost system we designed, which is compared with a commercially available, accurate device. The evaluation was done by means of a set of experiments, in which volunteers performed isometric and dynamic exercises while EMG signals from the rectus femoris muscle were registered by both the proposed low-cost system and a commercial system simultaneously. Analysis and assessment of three indicators to estimate the similarity between both signals were developed. These indicated a very good result, with spearman’s correlation averaging above 0.60, the energy ratio close to the 80% and the linear correlation coefficient approximating 100%. The agreement between both systems (custom and commercial) is excellent, although there are also some limitations, such as the delay of the signal (<1 s) and noise due to the hardware and assembly in the proposed system.

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Different fatigue-resistant leg muscles and EMG response during whole-body vibration

Cited by 26 publications

References 41 publications

Implementation of a Portable Electromyographic Prototype for the Detection of Muscle Fatigue

Implementation of a Portable Electromyographic Prototype for the Detection of Muscle Fatigue

Effects of Whole-Body Vibration on Lumbar-Abdominal Muscles Activation in Healthy Young Adults: A Pilot Study

Validation of a Low-Cost Electromyography (EMG) System via a Commercial and Accurate EMG Device: Pilot Study

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