Related Experiment Video
Updated: Sep 2, 2025
Movement Retraining using Real-time Feedback of Performance
Published on: January 17, 2013
Reduction of risk factors for ACL Re-injuries using an innovative biofeedback approach: A phase I randomized clinical
Alexander T Peebles1, Thomas K Miller2, Jyoti Savla3
1Granata Biomechanics Lab, Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, VA, USA; Department of Engineering, Laurel Ridge Community College, Warrenton, VA, USA.
Objectives:
Determine the safety and initial efficacy of a novel biofeedback intervention to improve landing mechanics in patients following anterior cruciate ligament reconstruction (ACLR).
Methods:
Forty patients post-ACLR (age: 16.9 ± 2.0 years) were randomly allocated to a biofeedback intervention or an attention control group. Patients in the biofeedback group completed 12 sessions over six-weeks that included bilateral unweighted squats with visual and tactile biofeedback. Patients in the control group completed a six-week educational program. Lower extremity mechanics were collected during a bilateral stop jump at baseline, six-weeks, and 12-weeks post-intervention. Linear mixed-effects models adjusted for sex and graft type determined the main effects of and interactions between group and time.
Results:
No group by time interaction existed for peak knee extension moment symmetry. A group by time interaction existed for peak vertical ground reaction force symmetry (p = 0.012), where patients in the biofeedback group had greater improvements in symmetry between baseline and post-intervention that were not maintained through the retention assessments.
Conclusion:
This novel biofeedback program did not reduce risk factors for second ACL injuries. Future work could develop and test multidisciplinary interventions for reducing second ACL injury risk factors.
Clinicaltrials:
GOV IDENTIFIER: (NCT03273673).
