Lower Extremity Alignment and Dynamic Control With Associated Injury Risk in College Athletes With Knee Hyperextension
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 64
- 试验地点
- 1
- 主要终点
- Injury type
研究概览
简要总结
Knee hyperextension, also called genu recurvatum or back knee, is commonly seen in women, people with ligamentous laxity, stroke and cerebral palsy patients. This faulty posture would result in excessive tension of the passive tissues such as anterior cruciate ligament (ACL) and posterior capsule of the knee. Subjects may also develop compensations at hip and ankle joint, as well as lower extremity malalignment. Muscles surrounding the knee could also become dysfunctional when performing functional tasks requiring stability during terminal knee extension, during which uncontrolled knee hyperextension could easily be utilized to lock the joint for stability in gait and stair climbing. In athletes, landing from a jump on an extended knee is one of the common reasons resulting in ACL injury. Little is known about the injury rate of athletes with knee hyperextension who participate in sports involving jump-landing activities.
The aim of the study is to explore if knee hyperextension is associated with poor lower extremity alignment and dynamic control and injury rate in athletes requiring jump-landing activities.
One of the study hypothesis is that athlete with knee hyperextension can find more compensatory lower extremity alignments and poor control in dynamic movement than control group.
The other hypothesis is with or without knee hyperextension, the parameter of lower extremity alignment and dynamic control can predict injury rate in jump landing athlete.
详细描述
Investigators expect to recruit 100 subjects into 2 group- control group and knee hyperextension group (KH group). In knee hyperextension group, investigators will include college athletes having knee hyperextension alignment, no lower extremity injuries in past three months, and participating in jump-landing activities. Control group will match the gender, age, height, weight and sports to KH group. Inclusion criteria is the same as KH group, except the knee hyperextension angle is <5⁰ in control group. Every subjects will receive the first time assessment and follow up by filling the injury-follow-up form every months for about four months.
At the first assessment, investigators will measure lower extremity alignments include pelvic angle in sagittal plane, hip anteversion, tibiofemoral angle, knee hyperextension angle in supine and standing position, tibial rotation angle, and navicular drop; lower extremity muscle flexibility include rectus femoris, hamstrings, gastrocnemius, soleus, iliotibial band; lower extremity muscle strength include hip, knee, muscle group; dynamic control task will record tibio-femoral acceleration, angle change ground reaction force and EMG muscle firing during vertical jump and drop jump.
研究设计
- 研究类型
- Observational
- 观察模型
- Case Control
- 时间视角
- Prospective
入排标准
- 年龄范围
- 20 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •age ≥ 20 years old
- •knee hyperextension ≥ 5⁰
- •participate in jump- landing sports
- •training at least 3 days per week
- •no lower extremity injury last 3 months
排除标准
- •having knee surgery before
- •In the past three months have occurred lower extremity musculoskeletal injury leading the person can't participate in training or competition for at least three days
结局指标
主要结局
Injury type
时间窗: 4 months
Record injury type
Injury duration
时间窗: 4 months
time loss during the game or training (days)
次要结局
- knee extensors muscle strength(1st day)
- Soleus flexibility(1st day)
- Lower extremity alignments-tibiofemoral angle(1st day)
- Lower extremity alignments-hip external rotation angle(1st day)
- Lower extremity alignments-pelvic tilt on sagittal plane(1st day)
- Lower extremity alignments-knee hyperextension angle(1st day)
- Lower extremity alignments-hip internal rotation angle(1st day)
- Lower extremity alignments-hip anteversion(1st day)
- Lower extremity alignments-tibial rotation angle(1st day)
- Hamstrings flexibility(1st day)
- Dynamic task parameters-acceleration and angle(1st day)
- knee flexors muscle strength(1st day)
- Lower extremity alignments-navicular drop(1st day)
- Rectus femoris flexibility(1st day)
- Iliotibial band flexibility(1st day)
- Dynamic task parameters-Electromyography (EMG)(1st day)
- Gastrocnemius flexibility(1st day)
- Dynamic task parameters-ground reaction force(1st day)