Effects of whole-body vibration on chronic ankle instability: a systematic review.

Background and objective: Chronic ankle instability (CAI) is one of the most common sports injuries, and whole-body vibration (WBV) training has been used lately as a potential rehabilitation modality for these patients. The authors conducted a systematic review and meta-analysis to assess whether WBV training positively affects patients with CAI. Materials and methods: The authors systematically searched four databases, including MEDLINE (PubMed), Scopus, Web of Science, and Cochrane Central Register of Controlled Trials, for randomized and non-randomized trials evaluating the effects of WBV on individuals with CAI. The authors used Cochrane RoB2 to assess the risk of bias in randomized trials. A meta-analysis was conducted if three or more studies measured the same outcome. Effect estimates were pooled using a random-effects model. Results: Results were retrieved from seven articles encompassing 288 participants who had CAI. The reach distance of the Star Excursion Balance Test (SEBT) was regarded as the study's main finding. The authors saw a significant training effect on certain planes of motion on dynamic balance. The findings showed that the post-intervention measurements in the WBV group compared to control groups showed improvements in the posterolateral, posteromedial, and medial directions, respectively. There were also promising results on improvements in muscle activity, strength, and proprioception sense measurements with a great diversity in the reported parameters. Conclusion: The authors observed a significant WBV training effect on dynamic balance over posterolateral, posteromedial, and medial reach distances. These findings suggest future studies on the effects of WBV on muscle activity, strength, and proprioception in addition to dynamic and static balance.