The Therapeutic Effects of a Dynamics Closed Kinetic Chain Exercise Combination With Hip Adduction in Patients With Patellofemoral Pain Syndrome
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
- Amplitudes of muscle activation (unit: %MVC)
研究概览
简要总结
An imbalance in the activation and onset time of the vastus medialis oblique (VMO) and vastus lateralis (VL) muscles may be one of the primary causes of PFPS. Several studies have discussed various exercise methods believed to selectively contract the (VMO) muscle for treating patellofemoral pain syndrome. VMO activity is higher during static closed-chain tasks combined with hip adduction, indicating that performing hip adduction exercises may selectively strengthen the VMO muscle.
详细描述
Patellofemoral pain syndrome (PFPS) poses challenges in motor control and pain management, especially regarding balanced muscle activation of the vastus medialis oblique (VMO) and vastus lateralis (VL). This study introduces a home-based PFPS rehabilitation approach involving a squat exercise program with hip adduction, examining its effects on motor control and clinical outcomes. Thirty PFPS participants were randomly assigned to conventional squatting (SQU) or squatting with hip adduction (SQU-HA) groups. Participants performed exercises five days a week for 8 weeks, with pre- and post-assessments capturing clinical measures and motor control indicators using electromyography (EMG). This home-based program, integrating hip adduction into squats, enhances motor control, reduces knee stress, and improves daily function, ensuring continued care post-pandemic.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Single (Participant)
盲法说明
This was a prospective, randomized-controlled trial.
入排标准
- 年龄范围
- 20 Years 至 50 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Age 20-50 years.
- •Pain around the patella at least two of the following activities¬-standing up after prolonged sitting, going up and down the stairs, running, jumping, squatting, kneeling, and high-angle knee flexion for a long time.
- •Knee joint pain for ≥3 months.
- •Pain level of ≥ 30 mm on a 100-mm visual analog scale (VAS).
排除标准
- •Had a history of patellar subluxation, dislocation, or knee surgery.
- •Had central or peripheral neurological pathology.
- •Had an obvious knee joint deformity or lower extremity malalignment.
- •Experienced severe knee joint pain (VAS) score > 80 mm), or received nonsteroidal anti-inflammatory drugs, injections, or physical therapy within the past 3 months.
研究组 & 干预措施
squatting with hip adduction (SQU-HA) group
The participants stood equally on both legs on the floor with their feet shoulder-width apart and angled outward at 20°-30°. After a warm-up, the participants performed 45° squats with squeezing a Swiss ball of 18-cm diameter at a slow speed of 2 s for flexion and extension from the standing posture by using a commercial metronome. The squatting with knee flexion from 0° to 45° was the safest for people with PFPS.
干预措施: squatting with hip adduction (SQU-HA) group (Other)
squatting (SQU) group
The participants stood equally on both legs on the floor with their feet shoulder-width apart and angled outward at 20°-30°. After a warm-up, the participants performed 45° squats at a slow speed of 2 s for flexion and extension from the standing posture by using a commercial metronome. The squatting with knee flexion from 0° to 45° was the safest for people with PFPS.
干预措施: squatting with hip adduction (SQU-HA) group (Other)
结局指标
主要结局
Amplitudes of muscle activation (unit: %MVC)
时间窗: pre-intervention and after 8-week intervention
represented the mean RMSs for each muscle which was normalized by the maximal voluntary contractions (MVC).
VMO/VL ratio
时间窗: pre-intervention and after 8-week intervention
represents the amplitude ratio of VMO relative to VL.
Onset time (unit: msec)
时间窗: pre-intervention and after 8-week intervention
at 200 ms before the beginning of the trial, as the baseline, the onset of EMG activation was identified as the point at which the EMG amplitude was more than three standard deviations from the baseline level for at least 25 ms.
VMO - VL (unit: msec)
时间窗: pre-intervention and after 8-week intervention
represented the onset time differences of VMO relative to VL, with a positive (negative) value indicating a delayed (early) onset time of VMO relative to VL.
Q angle (unit: degree)
时间窗: pre-intervention and after 8-week intervention
The angle was calculated with the intersection formed by two lines crossing the center of the patella. The first line went from the ASIS to the center of the patella and the second from the anterior tuberosity of the tibia to the center of the patella.
The visual analogue scale (VAS) (unit: mm)
时间窗: pre-intervention and after 8-week intervention
VAS was used to assess pain severity. The participants were asked to mark their pain levels on a 100-mm ruler (ranging from 0 = "no pain" to 100 = "unbearable pain") before and after the exercise program.
patellofemoral pain severity scale (PSS) (unit: score)
时间窗: pre-intervention and after 8-week intervention
PSS was used to measure PFPS associated with functional activities over the past week. The scale comprises 10 items, including climbing/descending stairs, squatting, walking, jogging, running/sprinting, participating in a sport, sitting with knees bent (for 20 min), kneeling, resting, and following an activity. The maximum score was 100 points. The participants rated their pain on a 100-mm VAS, ranging from 0 = "no pain" to 100 = "unbearable pain".
次要结局
未报告次要终点
研究者
Wei-Hsien Hong
China Medical University
China Medical University Hospital