Comparing Localized And Whole-body Vibration On Lower Extremity Joint Kinematics: A Pilot Study

Whole-body vibration (WBV) has been utilized as a mechanism of activating proprioceptive pathways, while reestablishing neural connections to the muscle. Technological advancements of wearable, localized compression vibration sleeves (LCV) provide similar proprioceptive and neuromuscular stimulation while removing geographical barriers. Reducing joint and gait asymmetries is a leading way to help minimize injury and decrease mortality. Previous studies looked at effects of these modalities on walking speed and cadence, but not asymmetries. PURPOSE: The purpose of this study is to determine if any effects are observed between LCV and WBV on stride length (STRL) and step length (STEP) asymmetries. METHODS: Twelve male and female participants (22.16 ± 2.04 yrs, 1.73 ± .08 m, 74.84 ± 11.23 kg) volunteered to take part in this pilot study and served as their own control groups. A WBV plate was tested against the LCV sleeves to determine the influence of different styles of vibration on asymmetries within joint kinematics. Vibration was implemented utilizing a 1:1 work: rest ratio for 5 trials between recorded gait cycles. A 3D motion capture system was used to obtain joint kinematics. Joint kinematics were assessed before and after each modality to determine baseline for WBV and LCV. Paired samples t-tests were conducted to examine differences between variables. RESULTS: A statistically significant difference was noted in between pre and post LCV for STRL and STEP (.66% ± 3.12% vs. -.72% ± .99%, p = .05, -5.62% ± 10.44% vs. .94% ± 4.60%, p = .05), however there were no significant effects noted between pre and post WBV STRL or STEP. CONCLUSIONS: These results suggest vibration may help minimize asymmetry in stride and step length, which may support a reduction in injuries and decrease mortality. Post WBV saw a decrease in asymmetry in step length, but not in stride length. Using LCV as a modality to reduce joint asymmetries could serve as a method to prevent falls and increase neuromuscular stimulation. Further analysis is needed to continue to explore the effects of these modalities on lower extremity joint kinematics.