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Sports 2017, 5(2), 33; doi:10.3390/sports5020033

Relationships between Bat Swing Speed and Muscle Thickness and Asymmetry in Collegiate Baseball Players

1
Faculty of Sport and Health Science, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga 525-8577, Japan
2
Faculty of Socio-Environmental Studies, Fukuoka Institute of Technology, 3-30-1 Wajiro-higashi, Higashiku, Fukuoka 811-0295, Japan
3
Kanazawa Orthopaedic & Sports Medicine Clinic, 8-8-1 Ono, Ritto, Shiga 520-3016, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Joel T. Cramer
Received: 27 January 2017 / Revised: 29 May 2017 / Accepted: 1 June 2017 / Published: 2 June 2017
View Full-Text   |   Download PDF [376 KB, uploaded 2 June 2017]   |  

Abstract

The purpose of the present study was to examine the relationships between bat swing speed (BSS), muscle thickness, and muscle thickness asymmetry in collegiate baseball players. Twenty-four collegiate baseball players participated in this study. Maximum BSS in hitting a teed ball was measured using a motion capture system. The muscle thicknesses of the trunk (upper abdominal rectus, central abdominal rectus, lower abdominal rectus, abdominal wall, and multifidus lumborum), upper limb, and lower limb were measured using a B-mode ultrasonography. Lateral asymmetry between each pair of muscles was determined as the ratio of the thickness of the dominant side to that of the non-dominant side. Statistically significant positive correlations were observed between BSS and muscle thicknesses of the abdominal wall and multifidus lumborum on the dominant side (r = 0.426 and 0.431, respectively; p < 0.05), whereas only trends against this significance were observed between BSS and muscle thicknesses on the non-dominant side. No statistical correlations were found between BSS and the lateral asymmetry of any muscles. These findings indicate the importance of the trunk muscles for bat swing, and the lack of association between BSS and lateral asymmetry of muscle size. View Full-Text
Keywords: hitting; bat swing speed; ultrasonography; lateral dominance; abdominal muscle; back muscle hitting; bat swing speed; ultrasonography; lateral dominance; abdominal muscle; back muscle
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Tsuchikane, R.; Higuchi, T.; Suga, T.; Wachi, M.; Misaki, J.; Tanaka, D.; Miyake, Y.; Isaka, T. Relationships between Bat Swing Speed and Muscle Thickness and Asymmetry in Collegiate Baseball Players. Sports 2017, 5, 33.

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