Post-Fatigue Recovery of Strength, Balance and Performance Following Local Muscle Vibration Versus Passive Rest in Soccer Players: A Randomized Controlled Trial Publisher



Jafari M ; Otadi K ; Malmir K ; Ahmadi M
Source: Muscles, Ligaments and Tendons Journal Published:2026

Abstract

Background: Quadriceps fatigue compromises soccer performance and safety. This RCT tested whether local muscle vibration (LMV) provides superior recovery versus passive rest for strength, dynamic balance, and hop performance post-fatigue in semi-professional players. Methods: Twenty-six male soccer players (control group: 26.84 ± 4.52 years; LMV group: 25.85 ± 5.36 years) were randomly assigned to either the control (n = 13) or LMV group (n = 13). After a quadriceps fatigue protocol, the LMV group received 2 minutes of 60 Hz local vibration, while the control group rested passively for the same duration. Quadriceps maximal voluntary contraction (MVC), single-leg hop test, and Y-balance test were assessed at baseline, post-fatigue, and post-intervention/rest. Two-way repeated measures ANOVA was used for analysis. Results: MVC declined post-fatigue (LMV: p = 0.005, Cohen’s d = 0.76; control: p = 0.004, Cohen’s d = 0.80), with LMV showing better recovery (p = 0.004, Cohen’s d = 0.80) versus control (p = 0.046, Cohen’s d = 0.55). Single leg hop improved post-LMV (p = 0.010, Cohen’s d = 0.71). Y-balance test improvements occurred in anterior reach (LMV: p = 0.012, d = 0.50), posteromedial (LMV: p = 0.039; control: p = 0.002), posterolateral and composite scores (all p ≤0.002, with medium to large effect sizes). Conclusion: LMV produced superior recovery versus passive rest, with complete strength restoration, improved hop performance, and improved anterior dynamic balance. These improvements are likely due to enhanced muscle activation and better motor control following vibration. As a non-invasive intervention, LMV shows clinical utility for athletic recovery. The findings support its integration into sports rehabilitation, pending further investigation of optimal protocols across athletic populations. © 2026, SMC Media Srl. All rights reserved.