Abstract
Objective
To examine the effect of whole-body vibration (WBV) on running biomechanics in individuals
with anterior cruciate ligament reconstruction (ACLR).
Design
Single-blind randomized crossover trial.
Setting
Research laboratory.
Participants
Individuals (N=20) with unilateral ACLR (age [± SD]=22.3 [±3.3] years; mass=71.8 [±15.3]
kg; time since ACLR=44.9 [±22.8] months; 15 females, 10 patellar tendon autograft,
7 hamstrings autograft, 3 allograft; International Knee Documentation Committee Score=83.5
[±9.3]).
Main Outcome Measure
Participants performed isometric squats while being exposed to WBV or no vibration
(control). WBV and control conditions were delivered in a randomized order during
separate visits separated by 1-week washout periods. Running biomechanics of the injured
and uninjured limbs were evaluated before and immediately after each intervention.
Dependent variables included peak vertical ground reaction force (GRF) and loading
rate (LR), peak knee flexion angle and external moment, and knee flexion excursion
during the stance phase of running.
Results
There was an increase in knee flexion excursion (+4.1°, 95% confidence interval [CI]:
0.65, 7.5°) and a trend toward a reduction in instantaneous LR after WBV in the injured
limb (−4.03 BW/sec−1, 95% CI −0.38, −7.69). No effect was observed on peak GRF, peak knee flexion angle,
or peak external knee flexion moment, and no effect was observed in the uninjured
limb.
Conclusions
Our findings indicate that a single session of WBV acutely increases knee flexion
excursion. WBV could be useful to improve running characteristics in individuals with
knee pathology.
Keywords
List of abbreviations:
ACL (anterior cruciate ligament), ACLR (anterior cruciate ligament reconstruction), ANOVA (analysis of variance), BW (body weight), CI (confidence interval), GRF (ground reaction force), LR (loading rate), LSI (limb symmetry index), OA (osteoarthritis), PT (peak torque), RTD (rate of torque development), WBV (whole-body vibration)To read this article in full you will need to make a payment
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Article Info
Publication History
Published online: February 03, 2018
Footnotes
Financial Disclosure/Conflict of Interest Statement: none.
Clinical Trials Registration No.: NCT02851316.
Supported by the California State University Research, Scholarship, and Creative Activity Incentive Grant Program.
Identification
Copyright
© 2018 by the American Congress of Rehabilitation Medicine
