Actively Recruiting
The Effect of Whole-Body Vibration on Patellofemoral Joint Pain After Anterior Cruciate Ligament Reconstruction
Led by Chinese University of Hong Kong · Updated on 2026-03-18
50
Participants Needed
1
Research Sites
26 weeks
Total Duration
On this page
AI-Summary
What this Trial Is About
Anterior cruciate ligament (ACL) injury is common among sports participants, especially in non-contact sports. Many ACL injuries occur from movements like cutting, pivoting, and changing direction while running. Even after ACL reconstruction surgery, 30-50% of patients develop pain in the patellofemoral joint (PFJ) within 1-2 years. This pain may lead to osteoarthritis and reduced quality of life. The study aims to explore the effects of whole body vibration (WBV) therapy on PFJ pain after ACL reconstruction and investigate its underlying mechanisms. The study compares three groups: one receiving WBV therapy combined with pulsed electromagnetic fields (PEMF), one receiving WBV therapy only, and a control group performing static squats, single leg squats, and lunges without vibration. WBV therapy sessions are held twice a week for 8 weeks, totaling 16 sessions. Participants in the WBV + PEMF group receive PEMF treatment after each WBV session, while the WBV only group does not. The control group performs exercises without vibration. Participants will be assessed before and after the 8-week intervention period. Measures include the Knee injury and Osteoarthritis Outcome Score Patellofemoral subscale (KOOS-PF), muscle strength, muscle thickness, and pain levels using the Numeric Pain Rating Scale (NPRS). The study will monitor muscle function, knee pain, and joint health to evaluate the effects of WBV and PEMF therapies. The total participation duration is 8 weeks of treatment with outcomes measured pre- and post-intervention.
CONDITIONS
Brief Title
Vibration on Patellofemoral Joint Pain After ACLR
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Age between 18 to 60
- Unilateral ACL reconstruction surgery
- Persistent pain in the patellofemoral joint
- Pain or symptoms isolated to one knee
You will not qualify if you...
- Age over 60
- Bilateral ACL reconstruction
- Revision ACL reconstruction
- Any rheumatological diseases
- Previous injury to the opposite knee
- Any knee osteoarthritis
AI-Screening
AI-Powered Screening
Complete this quick 3-step screening to check your eligibility
Your Study Journey
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Duration - 8 weeks
Participants attend whole body vibration (WBV) therapy sessions twice a week for 8 weeks. Patients in the WBV + PEMF group receive pulsed electromagnetic fields (PEMF) therapy after WBV sessions. Control group participants perform static squats, single leg squats, and lunges without vibration.
Twice weekly visits for up to 8 weeks, totaling 16 sessions
Trial Site Locations
Total: 1 location
1
The Chinese University of Hong Kong
Hong Kong, Hong Kong
Actively Recruiting
Research Team
M
Michael Tim-Yun Ong, Prof.
How is the study designed?
Study Type
INTERVENTIONAL
Masking
NONE
Allocation
RANDOMIZED
Model
PARALLEL
Primary Purpose
TREATMENT
Number of Arms
3
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