J Orthop Sports Phys Ther. 2021 Apr;51(4):162-173. doi: 10.2519/jospt.2021.9893. Epub 2021 Jan 20.
To investigate whether the relationship between the acute-chronic workload ratio (ACWR) and health problems varies when different methodological approaches are used to quantify it.
Prospective cohort study.
An online questionnaire was used to collect daily health and training information from 86 elite youth footballers for 105 days. The relationship between players' training load and health was analyzed using a range of different definitions of ACWR and health problems. We used 21-day and 28-day chronic periods, coupled and uncoupled calculations, and the exponentially weighted moving average and rolling average. Acute-chronic workload ratio data were categorized as low, medium, or high, using predefined categories and scores. We compared medium to high, medium to low, and low to high categories. The outcome was defined in 3 ways: "all health problems," "all injuries," and "new noncontact injuries." We performed random-effects logistic regression analyses of all combinations, for a total of 108 analyses.
We recorded 6250 athlete-days and 196 health problems. Of the 108 analyses performed, 23 (21%) identified a statistically significant (<.05) association between the ACWR and health problems. A greater proportion of significant associations were identified when using an exponentially weighted moving average (44% of analyses), when comparing low to high categories (33%), and when using the "all health problems" definition (33%).
The relationship between the ACWR and health problems was dependent on methodological approach. .
探究当采用不同的方法来量化急-慢性工作量比值（ACWR）时，其与健康问题之间的关系是否会发生变化。
前瞻性队列研究。
通过在线问卷，在 105 天内收集了 86 名精英青年足球运动员的日常健康和训练信息。使用多种不同的 ACWR 和健康问题定义来分析运动员的训练负荷与健康之间的关系。我们使用了 21 天和 28 天的慢性期，结合和不结合的计算方法，以及指数加权移动平均和滚动平均。使用预定义的类别和分数，将 ACWR 数据分为低、中、高三个类别。我们比较了中到高、中到低和低到高的类别。结果定义为三种方式：“所有健康问题”、“所有损伤”和“新的非接触性损伤”。我们对所有组合进行了随机效应逻辑回归分析，总共进行了 108 次分析。
我们记录了 6250 名运动员日和 196 个健康问题。在进行的 108 次分析中，有 23 次（21%）发现 ACWR 与健康问题之间存在统计学显著关联（<.05）。当使用指数加权移动平均时（44%的分析），当比较低到高的类别时（33%），以及当使用“所有健康问题”定义时（33%），发现显著关联的比例更高。
ACWR 与健康问题之间的关系取决于方法学方法。
