The Efficacy of a 10-week Intervention, Using the Nordic Hamstring Exercise, on Repeated-sprint Ability in Football (Soccer) Players - a Randomized Controlled Trial
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 35
- 试验地点
- 1
- 主要终点
- Total sprint time measured during 4x6 sprints of 10 meters. The sprints are performed every 15s and the sets are separated by 3 minutes of rest.
研究概览
简要总结
The purpose of the study is to investigate the efficacy of a 10-week intervention, using the Nordic Hamstring exercise, on repeated-sprint ability in male sub-elite football players. The primary outcome measure is total sprint time during 4x6 sprint of 10 meters measured using dual-beam photoelectric cells. Additionally, eccentric knee flexor strength is measured using the Nordbord hamstring strength measure. The hypothesis is that strength training of the knee flexor muscles elicited by the Nordic Hamstring exercise will result in enhanced repetitive sprint-ability expressed as a decrease in total sprint time. Furthermore, baseline data is used to assess to correlation between eccentric hamstring strength and active hamstring flexibility AND sprint performance.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Other
- 盲法
- Single (Outcomes Assessor)
入排标准
- 年龄范围
- 17 Years 至 35 Years（Child, Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Sub-elite Danish football player
- •Able to participate fully in competitive football activities at the time of testing
排除标准
- •Hamstring pain resulting in loss of training and matches 2 months prior to study initiation.
- •Specific systematic strength training of the hamstring muscles (>1/week) in the preceding 2 months before study initiation.
- •Specific systematic sprint training (>1/week) in the preceding 2 months before study initiation.
- •Longstanding injury (>6 weeks) in the lower extremities in the preceding 6 months to study initiation.
研究组 & 干预措施
Nordic Hamstring
The Nordic Hamstring group performs a progressive strengthening program (Mjolsnes et al., 2004) comprising of the Nordic Hamstring exercise during a period of 10 weeks. The training load increases from one session per week in week 1 to 3 sessions per week in week 3-10. Number of sets and repetitions progressively increase from 2 to 3 and 5 to 12, respectively. The exercise program is performed in the end of a regular football training session.
干预措施: Nordic Hamstring (Other)
Control
The control group are asked not to perform the exercise or any other specific strength training for the hamstring muscles and to continue to play football as usual.
干预措施: Control (Other)
结局指标
主要结局
Total sprint time measured during 4x6 sprints of 10 meters. The sprints are performed every 15s and the sets are separated by 3 minutes of rest.
时间窗: Measured prior to and after the intervention period (at week 0 & 10)
次要结局
- Single sprint times (best sprint time, sprint time during last sprint).(Measured prior to and after the intervention period (at week 0 & 10))
- Maximal eccentric knee flexor strength measured using Nordbord device(Measured prior to and after the intervention period (at week 0 & 10))
- Correlation between eccentric hamstring strength and active hamstring flexibility AND sprint performance.(Measured prior to the intervention (at week 0))
- Eccentric knee flexor strength endurance measured during 12 repetitions of the Nordic Hamstring exercise using Nordbord device.(Measured prior to and after the intervention period (at week 0 & 10))
- Active range of motion of hamstring muscles measured using inclinometer.(Measured prior to and after the intervention period (at week 0 & 10))
研究者
Lasse Ishøi
PT
Hvidovre University Hospital