Comparison of elbow valgus laxity and medial elbow stabilizer parameters during repetitive pitching between high school baseball players with and without a history of medial elbow injury

Hattori, Hiroshi; Akasaka, Kiyokazu; Otsudo, Takahiro; Hall, Toby; Sakaguchi, Katsunobu; Tachibana, Yomei

doi:10.1016/j.jse.2022.07.032

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2024

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Cited by 2 publications

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“…It has been reported that repeated pitching caused the stiffness of the FPMs. 15 And a delay in the isometric force response time in stiff muscles results in a decrease in dynamic stability against valgus stress. 3 , 19 Therefore, this quantitative tool for assessing the degree of stiffness before and after pitching may be useful for management of medial elbow.…”

Section: Discussionmentioning

confidence: 99%

Elasticity assessment of flexor pronator muscles using shear wave elastography

Hoshika,

Itoigawa,

Takahashi

et al. 2024

JSES International

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Section: Discussionmentioning

confidence: 99%

Elasticity assessment of flexor pronator muscles using shear wave elastography

Hoshika,

Itoigawa,

Takahashi

et al. 2024

JSES International

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“…The ulnar collateral ligament (UCL) is the most important static stabilizer of the elbow under valgus forces. In addition, structures other than the UCL may play a role to stabilize the elbow, such as the flexor pronator muscles and heads of the radius [2,3].…”

Section: Introductionmentioning

confidence: 99%

Relationship between Medial Elbow Pain, Flexor Pronator Muscles, and the Ulnar Nerve in Baseball Players Using Ultrasonography

et al. 2022

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We aimed to clarify changes cross-sectional area (CSA) in flexor pronator muscles and the ulnar nerve (UN) in players with medial elbow pain between pitching phases. Forty-two male baseball players with and without medial elbow pain during throwing were included in this study. The players were divided into maximum external rotation (MER) and ball release (BR) groups according to the pitching phase in which pain was reported. The imaged region was the flexor digital profundus, flexor carpi ulnaris (FCU), flexor digitorum superficialis, and pronator teres muscles, as well as the UN. CSA at rest and during contraction was assessed using the ultrasonography software tracing function. For statistical analysis, the CSA at rest and at contraction in the healthy group, MER group and BR group was compared using one-way analysis of variance. There was a significant difference in CSA only in the FCU between the healthy (95.4 ± 15.5%) and the MER group (76.6 ± 12.5%) at rest (p = 0.004). There were significant differences in the UN between the healthy (105.0 ± 27.7%) and MER groups (176.4 ± 53.5%), and between the healthy and BR groups (132.9±21.1%) (p = 0.001 and p = 0.038, respectively). Our results suggest that athletes with medial elbow pain during the MER of pitching have ulnar nerve swelling.

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Comparison of elbow valgus laxity and medial elbow stabilizer parameters during repetitive pitching between high school baseball players with and without a history of medial elbow injury

Cited by 2 publications

References 18 publications

Elasticity assessment of flexor pronator muscles using shear wave elastography

Elasticity assessment of flexor pronator muscles using shear wave elastography

Relationship between Medial Elbow Pain, Flexor Pronator Muscles, and the Ulnar Nerve in Baseball Players Using Ultrasonography

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