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Sports Economics Uncut

Ju Young Lee

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Interview With Sohyun Cho, Two-Time Captain of South Korea’s FIFA Women’s World Cup Team

Kyuhyun Choi, Ju Young Lee, and Alex Gang

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The Relationship Between Physical Activity Level of Parents and That of Their Adolescent Children

Hyo Jung Yoon, Sang Ah Lee, Young Jun Ju, Jin Young Nam, and Eun-Cheol Park

Background: Intergenerational transmission, which refers to the similarity between parent and their children, is a possible explanation of adolescent physical activity (PA). However, only a few existing studies explore the relationship of parent–adolescent PA in East Asian countries. Therefore, this study aimed to investigate the association of parent–adolescent PA using a nationally representative data in Korea with a large sample size. Methods: Data were collected from the Korean National Health and Nutrition Examination Survey conducted from 2010 to 2014. The authors performed a linear mixed effects regression analysis with 1342 cases after using log conversion of parent and adolescent moderate- to vigorous-intensity physical activity (MVPA) levels. Results: In the study, the median MVPA of adolescents was 150 (interquartile range: 360) minutes per week. Adolescent MVPA levels were significantly correlated with their mother’s MVPA (β = 0.055, P = .02). Similar findings of greater association in girls and younger adolescents (age: 13–15 y) were found in subgroup analysis (girls: β = 0.073, P = .05; younger adolescents: β = 0.103, P = .001). Conclusion: Increasing maternal PA levels could stimulate their adolescent’s PA levels. Therefore, intervention at the family level may lead to an increase in adolescent PA levels.

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Three-Dimensional Analysis of Scapular Kinematics During Arm Elevation in Baseball Players With Scapular Dyskinesis: Comparison of Dominant and Nondominant Arms

Jin-Young Park, Junhyun Kim, Beom Ho Seo, Ho Dong Yu, Ju Hyun Sim, Jae Hyung Lee, Kyung Soo Oh, and Seok Won Chung

Background: The knowledge of 3-dimensional scapular kinematics is essential for understanding the pathological lesions of the shoulder and elbow in throwing athletes. Many studies about alterations of the resting scapular position, dynamic scapular motion, or scapular dyskinesis (SD) have been conducted, yet none of them have identified a consistent pattern of altered scapular kinematics in throwing athletes. Hypothesis/Purpose: To analyze the 3-dimensional scapular kinematics of dominant and nondominant arms in baseball players with a pathological condition of the shoulder or elbow. Study Design: Cross-sectional study. Methods: Bilateral scapular positions, consisting of upward rotation (UR), superior translation (ST), internal rotation (IR), protraction (PRO), and anterior tilting (AT) with an arm at rest and at 150° forward elevation, were measured among 319 baseball players with SD using 3-dimensional computed tomography. Angular values of scapula were compared between dominant and nondominant arms with statistical analysis. Level of Evidence: Level III, diagnostic study. Results: The scapular position of dominant arms showed significantly more AT, less ST at rest and more UR and IR and less ST, PRO, and AT at 150° full forward elevation compared with the nondominant arms. The magnitude of mean change of UR, IR, PRO, and AT during arm elevation increased significantly between the paired arms (P value: UR, ST, PRO, and AT: <.001 and IR: .001). Conclusion: When compared with the nondominant arms, UR, AT, and PRO with the arm at 150° forward elevation of dominant symptomatic arms in baseball players tilted toward positive compensation, whereas IR altered toward negative decompensation. In addition, the angular increment of the scapula increased significantly in dominant symptomatic arms compared with the nondominant arms.