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The Effect of Whole Body Vibration After ACLR

Not Applicable
Recruiting
Conditions
ACL Injury
Interventions
Other: whole body vibration
Other: Conventional exercise training
Registration Number
NCT05254054
Lead Sponsor
Chinese University of Hong Kong
Brief Summary

This is a randomised clinical trial to detect the effect of an 8-week whole body vibration training on muscle function and dynamic knee function during single leg squat and single leg hop in patients after anterior cruciate ligament reconstruction

Detailed Description

In Hong Kong, over 3000 cases of ACL reconstruction are operated annually to restore knee stability. Despite recovery of knee passive laxity and muscle strength, dynamic knee stability is often not restored. The whole body vibration has been found to improve muscle strength, proprioception and balance after ACL reconstruction. This project will investigate the effect of whole body vibration on muscle elasticity, muscle coordination and landing knee biomechanics. It may provide useful evidence to the application of whole body vibration in improving dynamic knee stability, which will lead to a significant improvement in healthcare management for ACL patients . The current study serves to provide a clinical guideline for post-ACL reconstruction rehabilitation.

Recruitment & Eligibility

Status
RECRUITING
Sex
All
Target Recruitment
50
Inclusion Criteria
  1. Aged 18-50;
  2. Physically active before injury with Tegner score more than 6 (recreational/professional sport level);
  3. Scheduled for ACLR because of sport injury;
  4. Be able to walk with a pair of elbow crutches independently at 1 month after ACLR.
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Exclusion Criteria
  1. Concomitant posterior cruciate ligament or lateral collateral ligament injury in the same knee;
  2. Injury to the contralateral side;
  3. Medical problems that are contradictory to WBV;
  4. Prior experience of WBV to avoid any training or memory effect;
  5. Women with pregnancy.
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Study & Design

Study Type
INTERVENTIONAL
Study Design
PARALLEL
Arm && Interventions
GroupInterventionDescription
Vibration groupConventional exercise trainingParticipants in Vibration group will receive an 8-week whole body vibration training in addition to conventional exercise training.
Vibration groupwhole body vibrationParticipants in Vibration group will receive an 8-week whole body vibration training in addition to conventional exercise training.
Control groupConventional exercise trainingParticipants in Vibration group will only receive conventional exercise training.
Primary Outcome Measures
NameTimeMethod
knee flexion angleimmediately after intervention, three month after intervention

Peak value of knee flexion will be assessed by the skin marker-based motion analysis system (Vicon MX, Oxford, UK) during single leg squat and single leg hop landing.

knee valgus angleimmediately after intervention, three month after intervention

Peak value of knee valgus will be assessed by the skin marker-based motion analysis system (Vicon MX, Oxford, UK) during single leg squat and single leg hop landing.

knee internal rotation angleimmediately after intervention, three month after intervention

Peak value of knee internal rotation will be assessed by the skin marker-based motion analysis system (Vicon MX, Oxford, UK) during single leg squat and single leg hop landing.

Vertical ground reaction forceimmediately after intervention, three month after intervention

Peak vertical ground reaction force will be evaluated by a synchronized force plate during single leg hop landing.

Knee valgus torqueimmediately after intervention, three month after intervention

Peak knee valgus torque will be evaluated by a synchronized force plate during single leg hop landing.

Knee extension torqueimmediately after intervention, three month after intervention

Peak knee extension torque will be evaluated by a synchronized force plate during single leg hop landing.

Secondary Outcome Measures
NameTimeMethod
muscle elasticityimmediately after intervention, three month after intervention

Shear elastic modulus of vastus medialis, vastus lateralis, semimembranosus and biceps femoris will be assessed by shear wave elastography ultrasound.

muscle strengthimmediately after intervention, three month after intervention

Isometric muscle strength of quadriceps and hamstring will be tested using an hand-held dynamometer. The isokinetic muscle strength of quadriceps and hamstring will be tested at 60°/s and 180°/s by the isokinetic dynamometer

muscle activationimmediately after intervention, three month after intervention

Muscle activity level of vastus lateralis, vastus medialis, biceps femoris and semitendinosus will be assessed by electromyography

Trial Locations

Locations (1)

The chinese University of Hong Kong

🇭🇰

Hong Kong, Hong Kong

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