Effects of an ACWR-Guided Load Management Intervention on Time-Loss Injury Incidence in Chinese Elite Youth Footballers: A Cluster Randomised Controlled Trial
试验速览
- 阶段
- 不适用
- 状态
- 尚未招募
- 发起方
- 入组人数
- 847
- 主要终点
- Time-loss injury incidence rate per 1000 athlete-exposure hours.
研究概览
简要总结
This cluster-randomised controlled trial aims to evaluate whether a multi-component load management intervention-incorporating real-time acute:chronic workload ratio (ACWR) feedback, automated alerts, coach education, and structured load adjustment protocols-reduces time-loss injury incidence in Chinese elite mixed-gender adolescent football players compared with routine training practices.
详细描述
Background: Injury prevention in elite youth football is a public health and performance priority. Approximately two-thirds of players sustain at least one time-loss injury annually, with lower extremity injuries predominating. The acute:chronic workload ratio (ACWR) is widely used in sport science as a practical decision-support tool, yet experimental evidence for its effectiveness in reducing injury incidence remains limited and conflicting, particularly in Asian adolescent populations.
Objectives: This cluster-randomised controlled trial evaluates whether a multi-component ACWR-guided load management intervention reduces time-loss injury incidence in Chinese elite youth football players compared with routine practice.
Study Design: A prospective, two-arm, parallel-group, cluster-randomised controlled trial with 1:1 allocation, stratified by age group (U15/U17/U19).
Participants: Twenty-eight elite youth football teams (U15-U19, n=774, 45.2% female) from 28 academies in Henan Province.
Intervention: The intervention comprises real-time ACWR feedback, automated alerts for values outside the 0.8-1.3 range, coach education workshops, and structured load-adjustment protocols. Control teams follow routine practice without ACWR-derived feedback.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Prevention
- 盲法
- None
入排标准
- 年龄范围
- 13 Years 至 19 Years（Child, Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Age 13-19 years Member of a participating U15, U17, or U19 team No injury precluding full participation at enrolment Provided written informed consent (parental consent for minors)
排除标准
- •Injury precluding full participation at enrolment Failure to provide informed consent Age outside 13-19 years
结局指标
主要结局
Time-loss injury incidence rate per 1000 athlete-exposure hours.
时间窗: From enrolment to the end of the 10-month competitive season
Definition: Consistent with the football injury consensus statement, a time-loss injury is defined as any physical impairment sustained during structured football training or competitive matches that prevents a player from full participation in subsequent training sessions or matches. Injuries occurring outside football activities are not recorded.
次要结局
未报告次要终点
研究者
Jun Li
porfessor
Xinyang Agriculture and Forestry University