The Role of Muscle in Knee Stability

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

30 participants

Study Classification

OBSERVATIONAL

Study Start Date

2019-08-01

Study Completion Date

2020-01-31

Brief Summary

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This project aims to compare the difference in muscle strength, muscle elasticity and muscle coordination of quadriceps and hamstring muscle and their association with knee biomechanics during single leg hop landing in patients with anterior cruciate ligament reconstruction.

Detailed Description

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In Hong Kong, over 3000 cases of Anterior Cruciate Ligament Reconstruction (ACLR) are operated annually to restore knee stability. Despite recovery of knee passive laxity and muscle strength, dynamic knee stability is often not restored. In additional to muscle strength, muscle elasticity and muscle coordination may also play an important role in knee stability. However, there is no evidence regarding the changes in muscle elasticity after ACLR and its contribution to dynamic knee stability. This study is a cross-sectional study designed to compare the the difference in muscle strength, muscle elasticity and muscle coordination of quadriceps and hamstring muscle in 30 ACLR patients and investigate its relationship with knee biomechanics during single leg hop landing. Patient selection was base on medical records and subjective knee functional scores. Patient enrollment and informed consent was conducted first. Muscle strength was measured by isokinetic muscle testing(Biodex) at two speeds. Muscle elasticity was assessed by ultrasound shear wave elastography. Muscle coordination evaluated by electromyography(EMG) and knee biomechanics including kinematics and kinetics was measured by 3D motion analysis system(VICON) and all the assessments were done in CUHK-ORT Sports Injury Research Laboratory in the Prince of Wales Hospital, Hong Kong. All data was collected and analyzed by qualified personnel.

Conditions

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Anterior Cruciate Ligament Injuries

Keywords

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muscle strength muscle elasticity muscle coordination knee stability

Study Design

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Observational Model Type

COHORT

Study Time Perspective

CROSS_SECTIONAL

Eligibility Criteria

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Inclusion Criteria

* (1) Male aged 18-35 (2) With pre-injury activity level of more than 6 in Tegner score (3) Within their post-operative 6-18 months (4) Without injury history for the contralateral limb

Exclusion Criteria

* (1) With concomitant fracture, meniscus injury or chondral lesion (2) With preoperative radiographic signs of arthritis (3) With revision ACL surgery (4) With injury history of the spine or hamstring strain during the past 6 months.

Minimum Eligible Age

18 Years

Maximum Eligible Age

35 Years

Eligible Sex

MALE

Accepts Healthy Volunteers

No

Responsible Party

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Xin He

PhD candidate

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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The chinese University of Hong Kong

Hong Kong, , Hong Kong

Site Status

Countries

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Hong Kong

Other Identifiers

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2019.100

Identifier Type: -

Identifier Source: org_study_id