Effect of Different Local Vibration Durations on Knee Extensors' Maximal Isometric Strength - Archive ouverte HAL Access content directly
Journal Articles Applied Sciences Year : 2023

Effect of Different Local Vibration Durations on Knee Extensors' Maximal Isometric Strength

Abstract

The prolonged application (>20 min) of local vibration (LV) on muscles or tendons is known to reduce maximal isometric strength. However, the effect of short vibration durations (≤6 min) is still unknown. In fourteen participants, the changes in maximal voluntary isometric contraction (MVIC) were measured after 1, 3, and 6 min of rest (CONT) or local vibration (LV) over the quadricipital tendon (frequency: 100 Hz; amplitude: 0.5 mm). Before and after each condition, the amplitude of the twitch induced by a 100 Hz potentiated electrical doublet (PD POT); the relative electromyographic activity of the vastus medialis and rectus femoris muscle during the MVIC (RMS MVIC .M −1); the torque developed 50 ms after the onset of contraction (T 50); and the voluntary activation level (VAL) were evaluated. None of the three LV durations significantly changed the MVIC compared with the control condition (p = 0.379). The indices of central (i.e., VAL, T 50 , RMS MVIC .M −1) and peripheral (e.g., PD POT) fatigue were unaffected (p > 0.147). In conclusion, a short-duration LV (≤6 min) on a voluminous muscle group does not impair maximal force production or induce any central or peripherical fatigue.
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Dates and versions

hal-04245375 , version 1 (17-10-2023)

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Nicolas Amiez, Stella Zografou, Tom Timbert, Alain Martin, Spyridon Methenitis, et al.. Effect of Different Local Vibration Durations on Knee Extensors' Maximal Isometric Strength. Applied Sciences, 2023, 13 (20), pp.11376. ⟨10.3390/app132011376⟩. ⟨hal-04245375⟩
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