Effects of Whole Body Vibration on Quadriceps Function, Landing Biomechanics, and Performance in Individuals With ACL Reconstruction

Part of paid clinical trials in Chapel Hill, North Carolina.

Sponsor
University of North Carolina, Chapel Hill
Study ID
NCT07681193
Status
Completed

Conditions

  • ACL Injury
  • ACL Tear
  • Anterior Cruciate Ligament Injuries
  • Anterior Cruciate Ligament Tear
  • Biomechanical Phenomena

Eligibility Criteria

Sex
ALL
Age
18 Years - 35 Years
Healthy Volunteers
Not accepted

Interventions

  • Whole body vibration (WBV) — OTHER
    Participants will stand on a WBV platform in a mini-squat position while vibration is applied during six 60-second bouts with 2 minutes of rest between each bout. WBV will be delivered at an acceleration of 2g and a frequency of 30 Hz.
  • Sham Whole body vibration — OTHER
    Participants will stand on a WBV platform in a mini-squat position during six 60-second bouts with 2 minutes of rest between each bout. No vibration will be applied.

Study Details

Individuals who undergo anterior cruciate ligament reconstruction (ACLR) are at heightened risk of secondary anterior cruciate ligament (ACL) injury (e.g. additional injury to the ACL in either knee). One of the primary physiological consequences of ACLR is the presence of quadriceps dysfunction (i.e. reduced activation and strength) which has been linked to altered gait and landing biomechanics. Aberrant landing biomechanics have been associated with an increased risk of both primary and secondary ACL injury, thus additional research is needed to evaluate the efficacy of treatments aimed to reduce quadriceps dysfunction and restore adequate landing biomechanics in attempts to reduce secondary ACL injury. Whole-body Vibration (WBV) has demonstrated success in improving quadriceps function and gait biomechanics in individuals with ACLR, however its effectiveness on landing biomechanics is unknown. To evaluate the acute effects of WBV on landing biomechanics in those with ACLR, a non-randomized crossover-controlled trial was conducted to determine if a single bout of WBV improved landing biomechanics greater than a control condition. Participants completed two separate testing sessions (separated by at least one week) in which measures of quadriceps function and landing biomechanics were assessed before and after either a control (no WBV) or WBV intervention. Separate linear mixed-effects models of post-test values for each dependent outcome were conducted with condition (control vs WBV) and limb (ACLR vs Uninvolved) as an interaction term, and each condition pre-test values and time post-ACLR as fixed effect covariates and a random effect of subject. The investigators expect to observe a significant improvement in landing biomechanics following WBV compared to the control condition.

Key Dates

First listed
Jul 2, 2026
Start date
Sep 1, 2021
Status verified
Jun 2026
Primary completion
Apr 22, 2022
Completion
May 10, 2022

Study Design

Enrollment
36 participants (actual)
Allocation
NON_RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
BASIC_SCIENCE

Arms

  • Experimental: Whole body vibration followed by No Intervention (Control)
    Participants in this arm will receive Whole Body Vibration followed by a washout period of 1 week, then receive the Sham Whole body vibration (Control). Each condition will be evaluated in a single session (i.e. acute effects).
  • Experimental: Sham Whole body vibration (Control) followed by Whole Body Vibration
    Participants in this arm will receive Sham Whole body vibration (Control) followed by a washout period of 1 week, then receive Whole Body Vibration. Each condition will be evaluated in a single session (i.e. acute effects).

Primary Outcome Measure

Internal Knee Adduction Moment (KAM) [ Time Frame: Separate values prior to and immediately following the intervention (within 5 minutes). ]

Locations (1)

FacilityCityStateZIPSite coordinators
Univesrity of North Carolina at Chapel HIll MOTION Science InstituteChapel HillNorth Carolina27599-

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By research site
Univesrity of North Carolina at Chapel HIll MOTION Science Institute· Chapel Hill, NC

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