Preprint Article Version 1 NOT YET PEER-REVIEWED

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. Faculty of Sport and Health Science, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga 525-8577, Japan; Kanazawa orthopaedic & sports medicine clinic, 8-8-1 Ono, Ritto, Shiga 520-3016, Japan
Version 1 : Received: 8 August 2016 / Approved: 8 August 2016 / Online: 8 August 2016 (14:36:41 CEST)

How to cite: 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. Preprints 2016, 2016080082 (doi: 10.20944/preprints201608.0082.v1). 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. Preprints 2016, 2016080082 (doi: 10.20944/preprints201608.0082.v1).

Abstract

The purpose of the present study was to examine the relationships between bat swing speed (BSS) and muscle thickness and lateral asymmetry of the trunk and limbs in collegiate baseball players. Twenty-four collegiate baseball players participated in this study. The 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. 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), while nearly significant positive correlations were observed between BSS and muscle thicknesses on the non-dominant side. No significant correlations were found between BSS and lateral asymmetry of all 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.

Subject Areas

hitting; ultrasonography; lateral dominance; abdominal muscle; back muscle

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