Can Whole-Body Vibration Exercises in Different Positions Change Muscular Activity of Upper Limbs? A Randomized Trial

Abstract

The aim of this study was to investigate the acute effects of whole-body vibration exercises (WBVE) in different positions on muscular activity of flexor digitorum superficialis (FD), wrist extensor (ED), and handgrip strength (HG) of healthy men. Fifteen participants have performed 5 test sets each one consisting of HG strength measurement and 1-minute WBVE intervention (frequency: 50 Hz, amplitude: 1.53 mm, synchronous tri-planar oscillating/vibratory platform), that could be control (no exposition to vibration), squat (30 seconds of rest and 30 seconds of WBVE in squat position), or push-up (30 seconds of rest, and 30 seconds of WBVE in push-up position). After testing, participants had 2 minutes of rest and then were encouraged to keep themselves on a pull-up bar for 30 seconds. During all procedures, muscular activity of FD and ED was measured by surface electromyography (EMG). Statistical analysis has revealed that the EMG measured in the FD during the static pull-up bar exercise after SQUAT condition was significantly higher (P = .004) than the CONTROL and PUSH-UP conditions. Whole-body vibration exercises in squat position increase acutely muscle activation of the FD during isometric exercises of longer duration, while muscle activation of ED and HG strength are not affected by WBVE.

Transmission of Acceleration From a Synchronous Vibration Exercise Platform to the Head During Dynamic Squats

“…We observed that mechanical vibration can be amplified as it is transmitted through the skeleton and that knee flexion is an important factor for limiting the amount of vibration energy reaching the head. We have not evaluated exercises involving vibration passed to the body while sitting on the platform (eg, abdominal crunches or sit-ups), 6 sitting off the platform with feet on the platform, 40,41 placing hands on the vibration platform (eg, planks or push-ups), 5,6,[42][43][44] or performing bicep curls and tricep extensions holding nylon straps attached to the vibration platform. 45 We advocate caution as these postures may result in excessive vibration energy reaching the head as the vibration is transmitted to the upper body, bypassing the knees and the vibration attenuation that knee flexion provides.…”

Whole-Body Vibration Exercise in Different Postures on Handgrip Strength in Healthy Women: A Cross-Over Study

“…Studies investigating the effects of WBVE on HS are controversial. To the best of our knowledge, only one study has assessed the effects of WBVE in different positions (30 s of rest and 30 s of WBVE on the push-up, and squat conditions) on HS and muscular activity of FDSM in military soldiers ( Morel et al, 2018 ), and no positive effects being recorded.…”

“…To date, most literature regarding EMGrms during WBVE has been focused on the lower extremity. By contrast, few studies have investigated the effects of vibration on the EMGrms of the upper extremity muscles so far ( Hand et al, 2009 ; Di Giminiani et al, 2014 ; Ashnagar et al, 2016 ; Morel et al, 2018 ). Bosco et al (1999) suggested the use of the ratio between EMGrms and HS, i.e., neural ratio (NR).…”

Efeito agudo do estímulo vibratório com barra flexível na ativação dos músculos escapulares em indivíduos com e sem a síndrome da dor subacromial

“…END (0-10) Inicial, média (DP) † † 1,8 (2,2) # 0 (0) END (0-10) Após Exercício BF, média (DP) † † 2,6 (2,8) £,# 0,1 (0,5) END (0-10) Após Fadiga Subjetiva, média (DP) † † 4,2 (3,3) £,# 0,6 (1,5) £ EBM (0-10) Após Exercício BF, média (DP) 2,5 (1,7) 1,5 (1,3) EBM (0-10) Após Fadiga Subjetiva, média (DP) 5 (2, (Anders et al, 2007;Sánchez-Zuriaga et al, 2009) provavelmente não foi suficiente para causar excitação dos motoneurônios alfa e consequentemente não gerou aumento da atividade EMG e da força muscular, bem como não afetou o SPA. A literatura aponta que o mesmo ocorre com a atividade EMG quando aplicada a vibração local no músculo bíceps braquial (Cochrane, 2016) e no tronco através de plataforma vibratória (Morel et al, 2018) de indivíduos saudáveis.…”