Objective To study whether an injury prevention exercise programme would reduce the number of injuries in youth floorball players. Methods 81 youth community level floorball teams (48 clusters=clubs) with female and male players (12–17 years) were cluster-randomised into an intervention or control group. Intervention group coaches were instructed to use the Swedish Knee Control programme and a standard running warm-up before every training session, and the running warm-up before every match, during the season. Control teams continued usual training. Teams were followed during the 2017/2018 competitive season (26 weeks). Player exposure to floorball and occurrence of acute and overuse injuries were reported weekly via a web-based player survey using the Oslo Sports Trauma Research Centre Questionnaire. Results 17 clusters (301 players) in the intervention group and 12 clusters (170 players) in the control group were included for analyses. There were 349 unique injuries in 222 players. The intervention group had a 35% lower incidence of injuries overall than the control group (adjusted incidence rate ratio (IRR) 0.65, 95% CI 0.52 to 0.81). The absolute risk reduction was 6.6% (95% CI 3.2 to 10.0), and the number needed to treat was 152 hours of floorball exposure (95% CI 100 to 316). Intervention group teams had a 45% lower incidence of acute injuries (adjusted IRR 0.55, 95% CI 0.37 to 0.83). There was no difference in the prevalence of overuse injuries (adjusted prevalence rate ratio 0.96, 95% CI 0.73 to 1.26). Conclusion The Knee Control injury prevention programme reduced acute injuries in youth floorball players; there was no effect on overuse injuries. Trial registration number Clinical Trials NCT03309904.

中文翻译：

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使用损伤预防锻炼计划的青年地板球运动员（12-17 岁）的急性损伤发生率降低了 45%，但对过度使用损伤的发生率没有影响：双臂平行组群随机对照试验

目的研究预防伤害运动计划是否会减少青少年地板球运动员的受伤次数。方法 81 支由女性和男性球员（12-17 岁）组成的青年社区级别的福乐球队（48 个集群=俱乐部）被集群随机分为干预组或对照组。在赛季期间，干预组教练被指示在每次训练之前使用瑞典膝关节控制程序和标准跑步热身，并在每场比赛前进行跑步热身。控制小组继续常规训练。在 2017/2018 赛季（26 周）期间对球队进行了跟踪。通过使用奥斯陆体育创伤研究中心问卷的基于网络的球员调查每周报告球员接触地板球以及急性和过度使用伤害的发生。结果 干预组的 17 个集群（301 名参与者）和对照组的 12 个集群（170 名参与者）被纳入分析。222 名球员中有 349 处独特的伤病。干预组的总体损伤发生率比对照组低 35%（调整后的发生率比 (IRR) 0.65，95% CI 0.52 至 0.81）。绝对风险降低为 6.6%（95% CI 3.2 至 10.0），需要治疗的次数为 152 小时的地板球暴露（95% CI 100 至 316）。干预组团队的急性损伤发生率降低了 45%（调整后的 IRR 0.55，95% CI 0.37 至 0.83）。过度使用伤害的患病率没有差异（调整后患病率比为 0.96，95% CI 为 0.73 至 1.26）。结论 膝关节控制损伤预防计划减少了青少年地板球运动员的急性损伤；对过度使用伤害没有影响。试验注册号临床试验 NCT03309904。