■美国职业棒球大联盟(MLB)选秀是球员进入美国职业棒球的常见途径。在较早的回合中被选中的玩家通常是表现较高的玩家。当特别看投手时,业余水平的较高表现可能与投掷肘部自适应变化的频率增加有关。
■为了确定在MLB选秀的较早回合中采取的投手在肘部的病变频率或程度是否更大,通过动态应力超声测量。
■横断面研究;证据水平,3.
■对651名专业投手的优势和非优势臂进行了18年的动态应力超声(SUSs)。383名选秀球员根据他们的选秀回合(第1-5、6-10、11-20、21轮)进行分组。比较各组的“相对”尺侧副韧带(UCL)厚度(优势-非优势),相对肱骨关节松弛度(应力下的关节间隙距离减去静止时的关节间隙),和病理的存在(钙化,眼泪,低回声病灶,骨赘)。此外,我们进行了一项亚组分析,以比较有数据的参与者在3年内SUS结果的进展.
■选拔赛组的年龄没有差异,以前春季训练的次数,或者惯用手.比较基线测量值,拉拔轮和相对UCL厚度之间没有显著关系(P=.932),相对松弛(P=.996),或在SUS上可检测到的病理学的存在(P=.642)。然而,相对UCL厚度增加与SUS病理的存在显着相关(比值比,1.45;95%CI,1.26-1.69;P<.001)。纵向,选秀与相对松弛的3年进展之间没有显著关系,相对UCL厚度,或病理的临床进展。
■在美国职业棒球大联盟选秀的早些时候起草了表现更高的投手。这可能归因于峰值俯仰速度,在游戏中的表现,在玩家展示期间获得的可见性,或任何数量的其他运动特定的变量。然而,尽管如此,牵伸轮与肘部适应性变化或UCL对应力超声的特定特性之间没有显着关系。
The Major League Baseball (MLB) draft is a common route for players to enter professional baseball in the United States. Players taken in earlier rounds are typically higher-performing players. When looking at pitchers specifically, higher performance at the amateur level may be associated with an increased frequency of adaptive change in the throwing elbow.
To determine whether pitchers taken in earlier rounds of the MLB draft have a greater frequency or extent of pathological change in the elbow, as measured by dynamic stress ultrasound.
Cross-sectional
study; Level of evidence, 3.
Dynamic stress ultrasounds (SUSs) were performed over 18 years on the dominant and nondominant arms of 651 professional pitchers. The 383 drafted players were grouped according to the round in which they were drafted (rounds 1-5, 6-10, 11-20, 21+). Groups were compared with respect to \"relative\" ulnar collateral ligament (UCL) thickness (dominant-nondominant), relative ulnohumeral joint laxity (joint space distance under stress minus joint space at rest), and the presence of pathology (calcifications, tears, hypoechoic foci, osteophytes). In addition, a subgroup analysis was done to compare the progression of SUS findings over 3 years in players for which data were available.
Draft round groups did not differ by age, number of previous spring training, or handedness. Comparing baseline measurements, there was no significant relationship between draft round and relative UCL thickness (P = .932), relative laxity (P = .996), or presence of pathology detectable on SUS (P = .642). However, increased relative UCL thickness was significantly associated with the presence of pathology on SUS (odds ratio, 1.45; 95% CI, 1.26-1.69; P < .001). Longitudinally, there was no significant relationship between draft round and 3-year progression of relative laxity, relative UCL thickness, or clinical progression of pathology.
Higher-performing pitchers are drafted earlier in the MLB draft. This may be attributable to peak pitch velocity, in-game performance, visibility gained during player showcases, or any number of other sport-specific variables. However, despite this, there was no significant relationship between draft round and adaptive changes to the elbow or specific properties of the UCL on stress ultrasound.