Malina Robert M, Morano Peter J, Barron Mary, Miller Susan J, Cumming Sean P, Kontos Anthony P
Tarleton State University, Stephenville, TX, USA.
Clin J Sport Med. 2006 May;16(3):214-22. doi: 10.1097/00042752-200605000-00005.
To estimate the incidence of injuries in youth football and to assess the relationship between player-related risk factors (age, body size, biological maturity status) and the occurrence of injury in youth football.
Prospective over two seasons.
Two communities in central Michigan.
Subjects were 678 youth, 9-14 years of age, who were members of 33 youth football teams in two central Michigan communities in the 2000 and 2001 seasons.
Certified athletic trainers (ATCs) were on site to record the number of players at all practices and home games (exposures) and injuries as they occurred. A reportable injury (RI) was defined by the criteria used in the National Athletic Trainers' Association (NATA) survey of several high school sports. Estimated injury rates (95% confidence intervals) per athlete exposures (AE) and per number of athletes were calculated for practices and games by grade. Player risk factors included age, height, weight, BMI and estimated maturity status.
Estimated injury rates and relative risks of injury during practices and games by grade; logistic regression to evaluate relationships between player-related risk factors and risk of injury.
A total of 259 RIs, 178 in practice and 81 in games, were recorded during the two seasons. Practice injury rates increased with grade level, while game injury rates were similar among fourth through fifth grade and sixth grade players and about twice as high among seventh and eighth grade players. The majority of RIs during the two seasons was minor (64%); the remainder was moderate (18%) and major (13%). Injured fourth through fifth grade players were significantly lighter in weight and had a lower BMI; otherwise, injured and non-injured players within each grade did not differ in age, body size and estimated biological maturity status. Logistic regressions within grade revealed no significant associations between injury and age, height, BMI, and maturity status.
Game injury rates are higher than practice injury rates, and the incidence of injury tends to increase with grade level. Age, height, BMI and maturity status were not related to the risk of injury in youth football players.
评估青少年足球运动中损伤的发生率，并评估与运动员相关的风险因素（年龄、体型、生物成熟状态）与青少年足球运动中损伤发生之间的关系。
两个赛季的前瞻性研究。
密歇根州中部的两个社区。
678名9至14岁的青少年，他们是2000年和2001赛季密歇根州中部两个社区33支青少年足球队的队员。
由认证的运动训练师（ATC）在现场记录所有训练和主场比赛（暴露）中的运动员人数以及损伤发生情况。可报告损伤（RI）根据美国国家运动训练师协会（NATA）对几项高中体育项目调查所使用的标准进行定义。按年级计算训练和比赛中每位运动员暴露（AE）和每位运动员人数的估计损伤率（95%置信区间）。运动员风险因素包括年龄、身高、体重、体重指数（BMI）和估计的成熟状态。
按年级计算训练和比赛期间的估计损伤率和损伤相对风险；采用逻辑回归评估与运动员相关的风险因素和损伤风险之间的关系。
在两个赛季中，共记录了259例可报告损伤，其中训练中178例，比赛中81例。训练损伤率随年级升高而增加，而四年级至五年级和六年级球员的比赛损伤率相似，七年级和八年级球员的比赛损伤率约为前者的两倍。两个赛季中大多数可报告损伤为轻度（64%）；其余为中度（18%）和重度（13%）。四年级至五年级受伤球员的体重明显较轻，BMI较低；否则，各年级内受伤和未受伤球员在年龄、体型和估计的生物成熟状态方面没有差异。年级内的逻辑回归显示损伤与年龄、身高、BMI和成熟状态之间无显著关联。
比赛损伤率高于训练损伤率，且损伤发生率往往随年级升高而增加。年龄、身高、BMI和成熟状态与青少年足球运动员的损伤风险无关。
