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

Abstract

ObjectiveTo compare the effect of Whole-Body Vibration Exercise (WBVE) applied in push-up modified and half-squat positions, on handgrip strength (HS) and on the electromyography registry (EMGrms) of the flexor digitorum superficialis muscle (FDSM) of the dominant hand.MethodsNineteen healthy women (age 23.40 ± 4.03 years, bodyweight: 58.89 ± 9.87 kg), performed in a randomized order five different tests: (S1) Control; (S2) Push-up modified; (S3) Push-up placebo; (S4); Half-squatting; (S5) Half-squatting placebo. The HS and the EMGrms were assessed at baseline and immediately after the tests. ANOVA two-way design mixed test, with Tukey post hoc, was used to evaluate the HS, EMGrms and the ratio between EMGrms and HS, i.e., neural ratio (NR). Thus, the lower NR represents the greater neuromuscular modifications. The statistical significance level was set up at p < 0.05.ResultsWBVE on S2 increased HS compared to the stimulus applied to the S4 (p = 0.0001). The increase in HS was associated with a reduction in the EMGrms of the FDSM (p < 0.001) and a lower NR (p < 0.0001), i.e., greater neuromuscular modifications, in the S2 compared to the S4 after the tests.ConclusionThe distance of the stimulus and the positioning on the vibratory platform influence the maximum muscular strength due to neuromuscular modifications of hands in healthy women.

Acute Whole-Body Vibration Exercise Promotes Favorable Handgrip Neuromuscular Modifications in Rheumatoid Arthritis: A Cross-Over Randomized Clinical

“…Regarding the changes and consequent neuromuscular modifications of the hands, to our knowledge, there are no studies that have reported this in RA population. However, Krol et al [ 34 ] and other researches demonstrated an increase in the neuromuscular efficiency and concluded that vibration exercise can be useful to stimulate the neuromuscular system in healthy population [ 14 , 19 , 20 , 36 ].…”

“…Moreover, the stimulus duration varied from 10.5 minutes to 15 minutes intermittently [ 13 , 35 , 36 ]. Nevertheless, the current WBV parameters (frequency: 45 Hz; amplitude: 2 mm, acceleration: 159.73 m·s −2 ) of 5 minutes continuous WBV were selected based on previous research [ 19 , 20 , 22 , 23 ]. Additionally, all participants adhered to the 5-minute protocol and successfully completed the vibration without discomfort.…”

“…A horizontal bar at shoulder height was used to avoid trunk flexion during the intervention and to guarantee an elbow flexion of 10° ( Figure 3(b) ). The WBV parameters of frequency (45 Hz), amplitude (2 mm), and exposure duration of five minutes were selected in accordance with previous studies reporting positive outcomes [ 19 , 20 , 22 , 23 ].…”

“…From our previous work that reported immediate effects of WBV exercise in promoting a transient increase in muscle contractile performance in untrained healthy women [ 19 , 20 ], it seems plausible that vibration WBV may be a useful preparatory therapy capable of promoting neuromuscular modifications for the rehabilitation of the hands in women with stable RA. Therefore, the objective of the current study was to investigate the effect of WBV exercise in a single session on the static modified push-up position on the handgrip neuromuscular modifications in women with stable RA.…”

The Effects of Whole-Body Vibration Exercise on Anticipatory Delay of Core Muscles in Patients with Nonspecific Low Back Pain

“…Among our previous studies, a cross-sectional study demonstrated a negative correlation between lumbar neuromuscular function and pain in NSLBP patients [19] and a meta-analysis verified that compared with general exercise, core stability exercise is more effective in alleviating pain and increasing the lumbar muscular functional status in patients with low back pain in the short term [20]. As a new type of core stability exercise in pain relief [21], whole-body vibration (WBV) exercise requires the individual to perform static or steadily controlled exercises on an oscillating platform [22,23] and becomes a credible procedure for enhancing muscular performance [24][25][26][27]. A number of vibration-related research studies have suggested that these positive acute effects are attributed to neural adaptation, containing increased facilitated stretch reflex and muscle activation [23,28,29].…”