Division of Community Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden.
Football Research Group, Linköping, Sweden.
Am J Sports Med. 2020 Mar;48(3):723-729. doi: 10.1177/0363546519899359. Epub 2020 Jan 28.
Preseason training develops players' physical capacities and prepares them for the demands of the competitive season. In rugby, Australian football, and American football, preseason training may protect elite players against in-season injury. However, no study has evaluated this relationship at the team level in elite soccer.
PURPOSE/HYPOTHESIS: The aim of this study was to investigate whether the number of preseason training sessions completed by elite soccer teams was associated with team injury rates and player availability during the competitive season. It was hypothesized that elite soccer teams who participate in more preseason training will sustain fewer injuries during the competitive season.
Descriptive epidemiology study.
We used the Union of European Football Associations (UEFA) injury dataset to analyze 44 teams for up to 15 seasons (total, 244 team-seasons). Separate linear regression models examined the association between the number of team preseason training sessions and 5 in-season injury measures. Injury-related problems per team were quantified by totals of the following: (1) injury burden, (2) severe injury incidence, (3) training attendance, (4) match availability, and (5) injury incidence.
Teams averaged 30 preseason training sessions (range, 10-51). A greater number of preseason training sessions was associated with less injury load during the competitive season in 4 out of 5 injury-related measures. Our linear regression models revealed that for every 10 additional preseason training sessions that the team performed, the in-season injury burden was 22 layoff days lower per 1000 hours ( = .002), the severe injury incidence was 0.18 severe injuries lower per 1000 hours ( = .015), the training attendance was 1.4 percentage points greater ( = .014), and the match availability was 1.0 percentage points greater ( = .042). As model fits were relatively low (adjusted = 1.3%-3.2%), several factors that contribute to in-season injury outcomes were unaccounted for.
Teams that performed a greater number of preseason training sessions had "healthier" in-season periods. Many other factors also contribute to in-season injury rates. Understanding the benefit of preseason training on in-season injury patterns may inform sport teams' planning and preparation.
preseason 训练可发展运动员的体能，并使他们为比赛赛季的需求做好准备。在橄榄球、澳式足球和美式足球中， preseason 训练可能会使精英运动员免受赛季中受伤的影响。然而，在精英足球中，尚无研究评估这一团队层面的关系。
目的/假设：本研究的目的是调查 elite 足球队完成的 preseason 训练次数是否与球队在比赛赛季的受伤率和球员可用性有关。假设参加更多 preseason 训练的 elite 足球队在比赛赛季中受伤的可能性更小。
描述性流行病学研究。
我们使用了欧洲足球协会联盟（UEFA）的受伤数据集，分析了 44 支球队长达 15 个赛季（共计 244 个球队赛季）的数据。分别使用线性回归模型来检查球队 preseason 训练次数与 5 种赛季中受伤指标之间的关系。通过以下各项的总和来量化每个球队的与受伤相关的问题：（1）受伤负担，（2）严重受伤发生率，（3）训练出勤率，（4）比赛出勤率，以及（5）受伤发生率。
球队平均进行了 30 次 preseason 训练（范围：10-51）。在 5 种与受伤相关的指标中，有 4 种指标中 preseason 训练次数越多，比赛赛季的受伤负担越低。我们的线性回归模型表明，每增加 10 次 preseason 训练，每 1000 小时的伤病缺勤天数就会减少 22 天（ =.002），每 1000 小时的严重受伤发生率会降低 0.18 次（ =.015），训练出勤率会提高 1.4 个百分点（ =.014），比赛出勤率会提高 1.0 个百分点（ =.042）。由于模型拟合度相对较低（调整后的 = 1.3%-3.2%），许多其他因素也会影响赛季中的受伤结果。
进行了更多 preseason 训练的球队在比赛赛季中“更健康”。许多其他因素也会影响赛季中的受伤率。了解 preseason 训练对赛季中受伤模式的影响可能会为运动队的计划和准备提供信息。
