Hamano Noritaka, Shitara Hitoshi, Tajika Tsuyoshi, Ichinose Tsuyoshi, Sasaki Tsuyoshi, Kuboi Takuro, Shimoyama Daisuke, Kamiyama Masataka, Miyamoto Ryosuke, Endo Fumitaka, Nakase Kurumi, Kobayashi Tsutomu, Yamamoto Atsushi, Takagishi Kenji, Chikuda Hirotaka
Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Japan.
Prog Rehabil Med. 2021 Mar 10;6:20210015. doi: 10.2490/prm.20210015. eCollection 2021.
We aimed to examine the relationship between the hip range of motion (ROM) and ankle ROM and throwing-related shoulder and elbow injuries in elementary school baseball pitchers.
This retrospective comparative study (Level of evidence: Level III) included 195 baseball pitchers (mean age 10.8±1.0 years, range 8-12 years). All pitchers underwent physical function measurements, including height, weight, shoulder strength, and hip and ankle ROM. Shoulder and elbow injury was defined as shoulder and elbow pain that the pitchers had been aware of in the past or at the time of medical checkups. The results for the injured and non-injured groups were then compared.
The shoulder ROM and strength in the injured and non-injured groups did not differ to a statistically significant extent. The hip external rotation on the dominant side (injured vs. non-injured: 48.9±11.1° vs. 53.3±9.7°, P<0.01), the hip internal rotation on the non-dominant side (injured vs. non-injured: 36.6±12.0° vs. 40.9±11.0°, P=0.01), and ankle plantar flexion on the non-dominant side (injured vs. non-injured: 52.0±6.8° vs. 54.3±6.7°, P=0.02) were significantly smaller in the injured group than in the non-injured group.
The hip external rotation ROM on the dominant side and the hip internal rotation and ankle plantar flexion on the non-dominant side were significantly lower in the injured group than in the non-injured group. These results may suggest measures to reduce the incidence of elbow and shoulder injuries in elementary school baseball pitchers.
我们旨在研究小学棒球投手的髋关节活动范围（ROM）与踝关节ROM以及与投掷相关的肩部和肘部损伤之间的关系。
这项回顾性比较研究（证据级别：III级）纳入了195名棒球投手（平均年龄10.8±1.0岁，范围8 - 12岁）。所有投手均接受了身体功能测量，包括身高、体重、肩部力量以及髋关节和踝关节ROM。肩部和肘部损伤定义为投手在过去或体检时已知的肩部和肘部疼痛。然后比较受伤组和未受伤组的结果。
受伤组和未受伤组的肩部ROM和力量在统计学上没有显著差异。优势侧髋关节外旋（受伤组与未受伤组：48.9±11.1°对53.3±9.7°，P<0.01）、非优势侧髋关节内旋（受伤组与未受伤组：36.6±12.0°对40.9±11.0°，P = 0.01）以及非优势侧踝关节跖屈（受伤组与未受伤组：52.0±6.8°对54.3±6.7°，P = 0.02）在受伤组中明显小于未受伤组。
受伤组优势侧髋关节外旋ROM以及非优势侧髋关节内旋和踝关节跖屈明显低于未受伤组。这些结果可能提示降低小学棒球投手肘部和肩部损伤发生率的措施。
