右投手と左投手における筋量の比較 −筋量と投球速度との関係について−

長谷川　伸

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右投手と左投手における筋量の比較 −筋量と投球速度との関係について−

https://doi.org/10.15093/0002000109

名前 / ファイル	ライセンス	アクション
kiyo15-1-7.pdf (979 KB)

Item type

紀要論文 / Departmental Bulletin Paper(1)

公開日

2024-10-02

タイトル

右投手と左投手における筋量の比較 −筋量と投球速度との関係について−

言語

タイトル

Comparison　of muscle mass between right-handed and left-handed pitchers. – Correlation between muscle mass and ball speed –

言語

jpn

キーワード

言語

主題Scheme

Other

主題

muscle mass

キーワード

言語

主題Scheme

Other

主題

muscle thickness

キーワード

言語

主題Scheme

Other

主題

ball speed

キーワード

言語

主題Scheme

Other

主題

left-handed pitchers

資源タイプ

資源タイプ識別子

http://purl.org/coar/resource_type/c_6501

資源タイプ

departmental bulletin paper

ID登録

10.15093/0002000109

ID登録タイプ

JaLC

著者

長谷川　伸

著者（英）

姓名

Shin HASEGAWA

言語

抄録

内容記述タイプ

Abstract

内容記述

The purpose of this study was to compare the muscle mass between right-handed and left-handed pitchers
and to investigate the relationship between muscle mass and ball speed.
The subjects of this study were 67 male college baseball pitchers (49 right-handed pitchers and 18 lefthanded
pitchers). Body weight, body fat mass, lean body mass, skeletal muscle mass, and the muscle mass of the
upper limbs, trunk, and lower limbs were measured using a body composition analyzer. BMI, FFMI, and SMI were
calculated by dividing body weight, fat-free mass, and limb muscle mass by the square of height. The muscle
thicknesses of 12 areas (forearm anterior, upper arm anterior and posterior, chest, subscapular region, abdomen,
lateral abdomen, thigh anterior and posterior, and lower leg anterior and posterior) were measured using an
ultrasound diagnostic device. A speed gun was used to measure ball speed. The pitcher threw five maximum-effort
pitches to the catcher, and the highest value recorded was taken as the ball speed. To compare each measurement
index between right-handed and left-handed pitchers, an independent t-test was used. Additionally, Pearson's
correlation coefficient was calculated to examine the relationship between each measurement index and ball speed.
Ball speed was significantly higher in right-handed pitchers compared to left-handed pitchers (Right-handed:
136.6 ± 5.9 km/h, Left-handed: 132.2 ± 6.2 km/h). In right-handed pitchers, height, weight, fat-free mass, skeletal
muscle mass, and muscle mass in various areas (pitching arm, non-pitching arm, trunk, stride leg, and pivot leg)
showed significant correlations with ball speed. On the other hand, for left-handed pitchers, none of the metrics
showed a significant correlation with ball speed.
In the comparison of muscle thickness, right-handed pitchers showed significantly higher values than lefthanded
pitchers in the forearm anterior, upper arm posterior, and chest regions. In the relationship between muscle
thickness and ball speed, right-handed pitchers showed significant correlations between ball speed and muscle
thickness in the upper arm anterior and subscapular regions.
In conclusion, differences were observed between right-handed and left-handed pitchers in ball speed as well
as in muscle mass and thickness of the upper limbs and trunk. In right-handed pitchers, correlations were observed
between muscle mass and thickness in various regions and ball speed, whereas such correlations were not observed
in left-handed pitchers. On the other hand, FFMI and SMI were suggested to be important factors in determining
ball speed for both right-handed and left-handed pitchers.

言語

bibliographic_information

ja : 九州共立大学研究紀要

巻 15, 号 1, p. 43-50, 発行日 2024-09-30

出版者

九州共立大学

言語

item_10002_source_id_9

収録物識別子タイプ

PISSN

収録物識別子

21860483

item_10002_source_id_11

収録物識別子タイプ

NCID

収録物識別子

AA12533413

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