The Role of Quadriceps and Hamstring Muscles in Knee Stability During Single Leg Hop Landing in Patients With Anterior Cruciate Ligament Reconstruction
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 30
- 试验地点
- 1
- 主要终点
- muscle strength
研究概览
简要总结
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.
详细描述
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.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Cross Sectional
入排标准
- 年龄范围
- 18 Years 至 35 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 否
入选标准
- •(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
排除标准
- •(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.
结局指标
主要结局
muscle strength
时间窗: post-operatively 6-18 months
muscle peak torque of knee extension and knee flexion at 60°/s and 180°/s tested with isokinetic mode by Biodex
muscle elasticity
时间窗: post-operatively 6-18 months
muscle shear elastic modulus of vastus medialis, rectus femoris, vastus lateralis, semimembranosus,semitendinosus and biceps femoris was measured by ultrasound shear wave elastography
knee biomechanics during single leg hop landing
时间窗: post-operatively 6-18 months
knee kinematics(peak knee flexion, knee valgus, knee internal rotation, knee flexion excursion, valgus excursion and internal excursion) and kinetics(vertical ground reaction force, knee extension moment, knee valgus moment) were collected by 3D motion analysis system(VICON) during the landing phase of single leg hop test
muscle coordination
时间窗: post-operatively 6-18 months
muscle activity level and onset time of vastus medialis, vastus lateralis, semimembranosus,and biceps femoris was assessed by electromyography(EMG) during the landing phase of single leg hop test
次要结局
- subjective knee function(post-operatively 6-18 months)
- knee laxity(post-operatively 6-18 months)
- Psychological readiness for return-to-play(post-operatively 6-18 months)
研究者
Xin He
PhD candidate
Chinese University of Hong Kong