Department of Physical Therapy, Creighton University, Omaha, NE.
J Athl Train. 2021 Oct 1;56(10):1086-1093. doi: 10.4085/301-20.
Shoulder range of motion (ROM) and strength are key injury evaluation components for overhead athletes. Most normative values are derived from male baseball players, with limited information specific to female softball players.
To determine between-limbs differences in shoulder ROM and strength in healthy collegiate softball players.
Descriptive laboratory study.
University research laboratory and collegiate athletic training room.
Twenty-three healthy collegiate softball players (age = 19.9 ± 1.2 years, height = 170.5 ± 4.3 cm, mass = 78.4 ± 11.3 kg).
MAIN OUTCOME MEASURE(S): Shoulder ROM (internal rotation [IR] and external rotation [ER]), isometric strength (IR, ER, flexion, abduction [135°], and horizontal abduction), and a measure of dynamic strength (Upper Quarter Y-Balance Test) were obtained. Paired-samples t tests were used to determine between-limbs differences for each outcome measure.
Participants had more ER ROM (12° more) and less IR ROM (12° less) in the dominant arm, relative to the nondominant arm. No differences were present between limbs for any of the isometric strength measures or the Upper Quarter Y-Balance Test reach directions.
Female collegiate softball players demonstrated typical changes in ER and IR ROM in the dominant arm and relatively symmetric performance across strength measures, which contrasts with previous findings in male baseball players.
肩部活动范围（ROM）和力量是评估过顶运动员受伤的关键因素。大多数正常数据是从男性棒球运动员中得出的，而针对女性垒球运动员的具体信息有限。
确定健康的大学垒球运动员双侧肩部 ROM 和力量的差异。
描述性实验室研究。
大学研究实验室和大学运动训练室。
23 名健康的大学垒球运动员（年龄=19.9±1.2 岁，身高=170.5±4.3cm，体重=78.4±11.3kg）。
肩部 ROM（内旋[IR]和外旋[ER]）、等长力量（IR、ER、前屈、外展[135°]和水平外展）和动态力量测量（上四分之一 Y 平衡测试）。采用配对样本 t 检验确定每个结果测量的双侧差异。
与非优势臂相比，参与者的优势臂 ER ROM 多（12°），IR ROM 少（12°）。在任何等长力量测量或上四分之一 Y 平衡测试的伸展方向上，双侧之间均无差异。
女性大学垒球运动员在优势臂中表现出 ER 和 IR ROM 的典型变化，并且在力量测量方面表现出相对对称的性能，这与之前男性棒球运动员的研究结果形成对比。
