Effects of External Vibration Stimulation on Internal Rotation Range of Motion and Hamstring Strength

Authors

Shani Johnson PT, DScPT, COMT, Concordia University, St. PaulFollow
A. Aiello SPT, Concordia University, St. Paul
M. Beranek SPT, Concordia University, St. Paul
S. Goos SPT, Concordia University, St. Paul
R. Kelly SPT, Concordia University, St. Paul
C. Klemme SPT, Concordia University, St. Paul

Document Type

Poster

Publication Date

2023

Abstract

Introduction

• Whole body and localized vibration therapy have gained increased use in the fitness community, clinical setting, and research
• Efficacy as a modality option is yet to be determined

Objective

• Evaluate the effects of localized vibration treatment (LVT) to the sacral region on shoulder internal rotation (IR) range of motion (ROM) and isometric hamstring strength

Participants

• 50 Concordia University DPT Students
  • 28 females
  • 22 males
  • Age: 22-33 (Avg. 24)

Methods

• Baseline dominant extremity shoulder IR ROM measured in supine with manual goniometry
• Baseline hamstring strength measurements in prone using MicroFET^TM (hand held dynamometer), taken post 1 practice test
• Therapeutic intervention: application of LVT using the Hypervolt PlusR tool to 5 predetermined landmarks on sacral region for 40 seconds total
• Post-therapeutic intervention measurements
  • Prone hamstring strength using MicroFET^TM
  • Supine shoulder IR ROM with manual goniometry

Results

• Statistical significance (p < 0.05) was demonstrated for increased shoulder IR (mean difference 3.5 degrees)
• Hamstring strength did not rise to statistical significance (p=0.09)

Conclusion

• Vibration stimulation to neural dense area such as the sacral region can improve shoulder internal rotation range of motion.

Clinical Relevance

• Potential acute gains in ROM and strength to allow for greater effectiveness in subsequent PT interventions
• In sport training, LVT could be used as a quick and effective tool for increased athletic performance

Future Research

• Procedural modifications may improve outcomes
• Pelvis stabilization methods may demonstrate clinically significant improvements in hamstring strength
• Incremental testing post LVT delivery to assess duration of effects

Recommended Citation

Johnson, Shani PT, DScPT, COMT; Aiello, A. SPT; Beranek, M. SPT; Goos, S. SPT; Kelly, R. SPT; and Klemme, C. SPT, "Effects of External Vibration Stimulation on Internal Rotation Range of Motion and Hamstring Strength" (2023). DPT Capstone Posters. 24.
https://digitalcommons.csp.edu/dpt-posters/24