Kraeutler Matthew J, Belk John W, McCarty Eric C
Department of Orthopedics, University of Colorado School of Medicine, Aurora, Colorado, USA.
Orthop J Sports Med. 2017 Apr 21;5(4):2325967117703054. doi: 10.1177/2325967117703054. eCollection 2017 Apr.
There has been speculation that running backs with an excessive number of carries in college are less likely to be successful in the National Football League (NFL).
To determine whether there is a correlation between number of carries by college running backs and future performance and injury risk in the NFL.
Cohort study; Level of evidence, 3.
Using the ESPN archives of National Collegiate Athletic Association and NFL running backs, the following inclusion criteria were used: running backs who played their last college season from 1999 through 2012 and who were drafted in the first 4 rounds of the NFL draft following their college career. Players were grouped by number of carries during their final college season (group A, 100-200 carries; group B, 250+ carries). Performance and injury risk were compared between groups during the first 3 eligible seasons in the NFL. Groups were compared based on total number of carries, mean yards per carry, number of games missed due to injury, and the specific injuries resulting in missed playing time.
During the seasons studied, a total of 103 running backs were included (group A, n = 42; group B, n = 61). There was a trend toward a significantly greater mean total number of carries through 3 NFL seasons in group B (group A, n = 276 carries; group B, n = 376 carries; = .058). Mean yards per carry did not differ between groups (group A, n = 3.9 yards/carry; group B, n = 4.0 yards/carry; = .67). Groups A and B missed a mean 5.8 and 5.7 games, respectively, due to injury during their first 3 NFL seasons ( = .98). A significantly greater proportion of players in group A suffered a concussion compared with group B ( = .014).
There is no correlation between the number of carries by college running backs and future injury risk or performance during their early NFL career.
一直有人猜测，在大学期间持球次数过多的跑卫在国家橄榄球联盟（NFL）取得成功的可能性较小。
确定大学跑卫的持球次数与NFL未来表现及受伤风险之间是否存在关联。
队列研究；证据等级，3级。
利用美国大学生体育协会（NCAA）和NFL跑卫的ESPN档案，采用以下纳入标准：在1999年至2012年期间完成最后一个大学赛季，并在大学毕业后在前四轮NFL选秀中被选中的跑卫。根据他们在大学最后一个赛季的持球次数对球员进行分组（A组，100 - 200次持球；B组，250次及以上持球）。在NFL的前三个符合条件的赛季中，对两组之间的表现和受伤风险进行比较。根据总持球次数、平均每次持球码数、因伤错过的比赛场次以及导致缺阵的具体伤病情况对两组进行比较。
在研究的赛季中，共纳入103名跑卫（A组，n = 42；B组，n = 61）。B组在三个NFL赛季中的平均总持球次数有显著增加的趋势（A组，n = 276次持球；B组，n = 376次持球；P = 0.058）。两组之间的平均每次持球码数没有差异（A组，n = 3.9码/次持球；B组，n = 4.0码/次持球；P = 0.67）。A组和B组在其前三个NFL赛季中因伤平均分别错过5.8场和5.7场比赛（P = 0.98）。与B组相比，A组中遭受脑震荡的球员比例显著更高（P = 0.014）。
大学跑卫的持球次数与他们在NFL早期职业生涯中的未来受伤风险或表现之间没有关联。
