Persistent Neuromuscular Deficits in the Posterior Kinetic Chain Following Hamstring Strain Injury: A Cross-Sectional Study Using EMG
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 42
- 试验地点
- 1
- 主要终点
- Gluteus Maximus Activation (%MVIC)
研究概览
简要总结
This cross-sectional observational study investigated posterior chain muscle activation patterns in football players with and without a history of hamstring strain injury. Forty-two male athletes were assessed using surface electromyography (sEMG) during Nordic Hamstring Curl, Kettlebell Swing, and Supine Sliding Leg Curl exercises. Results demonstrated persistent deficits in biceps femoris, gluteus maximus, latissimus dorsi, and iliocostalis lumborum activation in previously injured athletes compared to controls, suggesting that neuromuscular alterations extend beyond the hamstring itself and may increase reinjury risk.
研究设计
- 研究类型
- Observational
- 观察模型
- Other
- 时间视角
- Cross Sectional
入排标准
- 年龄范围
- 18 Years 至 30 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Male football players, aged 18-30 years
- •Body mass index (BMI) between 18.5-24.9 kg/m²
- •Voluntary participation and written informed consent
- •Ability to perform all test exercises (Nordic Hamstring Curl, Kettlebell Swing, Supine Sliding Single-Leg Curl)
- •For injured group: unilateral hamstring strain within the past 6 months
- •For control group: no hamstring injury within the past 6 months
排除标准
- •Professional sports background
- •Lower or upper extremity injury within the last year (other than index hamstring strain for the injured group)
- •Neurological, musculoskeletal, respiratory, or cardiovascular conditions limiting participation
- •Recent spinal surgery
- •Acute low-back or lower-limb pain
- •Sensory impairments interfering with performance
- •History of malignancy
结局指标
主要结局
Gluteus Maximus Activation (%MVIC)
时间窗: Single laboratory visit; measurements during 3 repetitions of each exercise (Nordic Hamstring Curl, Kettlebell Swing, Supine Sliding Single-Leg Curl)
Surface EMG amplitude (RMS) normalized to MVIC, averaged across three functional exercises. Mean %MVIC compared between groups.
Biceps Femoris Long Head Activation (%MVIC)
时间窗: Single laboratory visit; measurements during 3 repetitions of each exercise (Nordic Hamstring Curl, Kettlebell Swing, Supine Sliding Single-Leg Curl)
Surface EMG amplitude (RMS) normalized to MVIC. Mean %MVIC across repetitions compared between injured and healthy athletes.
Latissimus Dorsi Activation (%MVIC)
时间窗: Single laboratory visit; measurements during 3 repetitions of each exercise (Nordic Hamstring Curl, Kettlebell Swing, Supine Sliding Single-Leg Curl)
Surface EMG amplitude (RMS) normalized to MVIC, averaged across three functional exercises. Mean %MVIC compared between groups.
Iliocostalis Lumborum Activation (%MVIC)
时间窗: Single laboratory visit; measurements during 3 repetitions of each exercise (Nordic Hamstring Curl, Kettlebell Swing, Supine Sliding Single-Leg Curl)
Surface EMG amplitude (RMS) normalized to MVIC. Mean %MVIC across repetitions compared between injured and healthy athletes.
次要结局
未报告次要终点