University of Texas at Austin and Tarleton State University, Stephenville, Texas, USA.
Clin J Sport Med. 2010 Mar;20(2):132. doi: 10.1097/01.jsm.0000369404.77182.60.
To investigate the association of relative skeletal age and other risk factors with injury in elite schoolboy footballers (soccer players).
Prospective cohort study, with players participating for varying numbers of years.
Manchester United Football Club Academy, 2001 to 2007.
Players were recruited to the club by scouts. At intake, the boys were medically screened to ensure they could be fully involved in the training and games program. Computerized medical records for the boys were maintained for the entire study period. The investigation included boys 9 to 16 years of age. Numbers varied between 98 and 144 per year (mean n/y = 130) over 6 years. Overall, 292 players were represented in the sample. Mean drop out per season was 21%.
Each year consenting players had a radiograph of the left wrist and hand for the assessment of skeletal age (SA), using the Fels method. Eighty-five players had at least 1 radiograph and 12 players had 6 radiographs, 1 in each year of the study. Early and late maturers were those with an SA >1 year older or younger, respectively, than their chronologic age (CA). Information on demographics, height and weight, playing and training times, and position played was collected.
The main outcome measure was the relation of maturity status to the occurrence of injuries.
For the total sample across all the age groups the incidence of injuries was 1.44 per 1000 hours of training (n = 244 injuries), and 10.5 per 1000 match hours (n = 169 injuries). The mean number of injuries per season was 79.3, with a mean loss of 12.5 injury days per player per season. Boys aged <14 years were most vulnerable. Most injuries resulted from overuse rather than from trauma. Most common injury type and location were, respectively, soft tissue and knee joint. Mean SA for the total sample was in advance of mean CA (12.08y vs 11.74y; P < 0.05). Injury incidence did not differ significantly among late, normal, and early maturing players (1.4, 1.5, and 1.8, respectively) when training time, playing time, height, and playing position were statistically controlled as covariates (P = 0.73). However, results of general log linear analysis of mean data over the 6 seasons indicated a relationship between injury occurrence and training time, match-play time, and the CA-SA difference (P < 0.05). The 3 variables together explained 48% of the variance in injury incidence. Position played, foot dominance, and mean height gain were not related to injury occurrence.
Maturity status and time spent in match play and training were significant predictors of injuries in 9- to 16-year-old elite male soccer players.
研究相对骨骼年龄和其他风险因素与优秀男校足球队（足球运动员）受伤的关系。
前瞻性队列研究，参与者参加了不同年限的研究。
曼彻斯特联队足球俱乐部学院，2001 年至 2007 年。
球探招募俱乐部的球员。在入组时，男孩们接受了医学筛查，以确保他们能够完全参与训练和比赛计划。男孩们的计算机化医疗记录在整个研究期间都有保留。该研究包括 9 至 16 岁的男孩。6 年间，每年的人数在 98 至 144 人之间（平均 n/y = 130）。共有 292 名球员参加了该研究。每个赛季的平均辍学率为 21%。
每年同意参加的球员都会接受左手腕和手部的 X 光检查，以使用 Fels 方法评估骨骼年龄（SA）。85 名球员至少有 1 次 X 光检查，12 名球员有 6 次 X 光检查，每年 1 次。早期和晚期成熟者分别是骨骼年龄比实际年龄大 1 岁或小 1 岁的人。收集了人口统计学、身高和体重、比赛和训练时间以及比赛位置等信息。
主要观察指标是成熟状态与受伤发生的关系。
对于所有年龄组的总样本，受伤的发生率为每 1000 小时训练 1.44 次（n = 244 次受伤），每 1000 次比赛 10.5 次（n = 169 次受伤）。每个赛季的平均受伤次数为 79.3 次，每个球员每个赛季平均受伤天数为 12.5 天。年龄<14 岁的男孩最容易受伤。大多数伤害是由于过度使用而不是外伤造成的。最常见的伤害类型和部位分别是软组织和膝关节。总样本的平均 SA 比平均 CA 提前（12.08 岁比 11.74 岁；P < 0.05）。当将训练时间、比赛时间、身高和比赛位置作为协变量进行统计学控制时，晚期、正常和早期成熟的球员之间的受伤发生率没有显著差异（分别为 1.4、1.5 和 1.8）（P = 0.73）。然而，6 个赛季平均数据的一般对数线性分析结果表明，受伤发生与训练时间、比赛时间以及 CA-SA 差异之间存在关系（P < 0.05）。这 3 个变量共同解释了受伤发生率的 48%。比赛位置、惯用脚和平均身高增长与受伤发生无关。
9 至 16 岁优秀男足球运动员的成熟状态以及比赛和训练时间与受伤显著相关。
Zotero 插件