Sumimoto Yasuhiko, Yokoya Shin, Kitasaka Akihiko, Harada Yohei, Deie Masataka, Adachi Nobuo
Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, JPN.
Orthopaedic Surgery, Hiroshima City Hiroshima Citizens Hospital, Hiroshima, JPN.
Cureus. 2023 Dec 2;15(12):e49844. doi: 10.7759/cureus.49844. eCollection 2023 Dec.
There are no studies examining changes in the physical function throughout the baseball season in Japanese professional players. We examined the range of motion (ROM) and muscle strength changes in professional baseball pitchers as the season progresses.
Five professional baseball pitchers were included. ROM, flexibility, and muscle strength of the trunk and shoulder, elbow, hip, knee, and ankle joints were measured pre-season (PRE), mid-season (MID), and post-season (POST).
The total shoulder arc ROM of the dominant sides significantly decreased compared to that of the nondominant sides at MID and POST. Shoulder abduction muscle strength of the dominant sides significantly decreased at POST compared to that at PRE. In the trunk, lateral flexion ROM of bilateral sides significantly decreased at MID and POST compared to that at PRE, and the duration time of the side bridge test of the dominant sides significantly decreased at POST to that at PRE. Hip extension ROM and muscle strength and internal rotation ROM of the push-off leg significantly decreased at POST compared to that at PRE.
The total shoulder arc ROM and shoulder abductor muscle strength of the dominant sides, trunk lateral flexion ROM and muscle strength, push-off leg hip joint extension muscle strength and ROM, and internal rotation ROM were more susceptible to changes as the season progressed. In order to maintain performance and prevent a throwing disorder, it is necessary to focus on these movements during the season and to appropriately train and condition these muscle groups.
尚无研究考察日本职业棒球运动员在整个赛季中身体功能的变化。我们研究了职业棒球投手在赛季进行过程中的关节活动范围（ROM）和肌肉力量变化。
纳入五名职业棒球投手。在赛季前（PRE）、赛季中（MID）和赛季后（POST）测量躯干和肩、肘、髋、膝及踝关节的ROM、柔韧性和肌肉力量。
与非优势侧相比，优势侧的总肩弧ROM在赛季中和赛季后显著降低。与赛季前相比，优势侧的肩外展肌肉力量在赛季后显著降低。在躯干方面，双侧的侧屈ROM在赛季中和赛季后与赛季前相比显著降低，优势侧的侧桥试验持续时间在赛季后与赛季前相比显著降低。与赛季前相比，蹬地腿的髋伸展ROM和肌肉力量以及内旋ROM在赛季后显著降低。
随着赛季的推进，优势侧的总肩弧ROM和肩外展肌力量、躯干侧屈ROM和肌肉力量、蹬地腿髋关节伸展肌肉力量和ROM以及内旋ROM更容易发生变化。为了保持运动表现并预防投掷障碍，在赛季中必须关注这些动作，并对这些肌肉群进行适当的训练和调理。
