The impact of accumulated pitching counts on performance and lower body neuromuscular fatigue in baseball players: a simulated game analysis.

IF 2 3区医学 Q3 ENGINEERING, BIOMEDICAL

Sports Biomechanics Pub Date : 2025-08-15 DOI:10.1080/14763141.2025.2546381

Hung-Chih Yeh, Chia-An Ho, Cheng-Hsun Hsieh, Hei-Tung Lau, En-Yu Chang, Chih-Wen Hsu, Wei-Hsuan Lin, Chin-Shan Ho

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引用次数: 0

Abstract

The study aimed to investigate the effects of accumulated pitching counts on lower body neuromuscular fatigue (NMF) and pitching velocity. Twelve first-level collegiate baseball pitchers completed seven simulated innings (a total of 105 pitches), during which data on ball speed, countermovement jump (CMJ), and rate of perceived exertion (RPE) were collected. Ball speed did not show a significant difference over time (F_7,77 = 2.14; p = 0.57; η² = 0.16). Except for the modified reactive strength index (mRSI) (F_7,77 = 0.14, p = 0.94; η² = 0.01), all other CMJ parameters showed significant differences (e.g. eccentric rate of force development: F_7,77 = 17.44; p < 0.01; η² = 0.53; concentric impulse: F_7,77 = 9.66; p < 0.01; η² = 0.46). RPE showed a significant difference over time (F_7,77 = 52.86; p < 0.01; η² = 0.82) with a large effect size. Accumulated pitch counts caused lower body NMF in pitchers, while ball speed remained stable. Coaches should actively monitor pitcher conditions after completing the fifth inning (75 pitches), as ball speed may not be a reliable indicator of fatigue.

查看原文本刊更多论文

累积投球次数对棒球运动员表现及下肢神经肌肉疲劳的影响：模拟比赛分析。

本研究旨在探讨累积投球次数对下体神经肌肉疲劳（NMF）和投球速度的影响。12名大学一级棒球投手完成了7局（共105球）的模拟比赛，在此期间收集了球速、反运动跳（CMJ）和感知用力率（RPE）的数据。球速随时间无显著差异(F7,77 = 2.14；p = 0.57；η2 = 0.16)。除修正反应强度指数（mRSI）外(F7,77 = 0.14, p = 0.94；η2 = 0.01)，其他CMJ参数(偏心力发展率：F7,77 = 17.44；p 2 = 0.53；同心冲量：F7,77 = 9.66；p 2 = 0.46)。RPE随时间差异有统计学意义(F7,77 = 52.86；P 2 = 0.82)，效应量较大。累积的投球数导致投手的下体NMF，而球速保持稳定。教练应该在完成第五局（75球）后积极监测投手的状况，因为球的速度可能不是疲劳的可靠指标。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Sports Biomechanics 医学-工程：生物医学

CiteScore

5.70

自引率

9.10%

发文量

135

审稿时长

>12 weeks

期刊介绍： Sports Biomechanics is the Thomson Reuters listed scientific journal of the International Society of Biomechanics in Sports (ISBS). The journal sets out to generate knowledge to improve human performance and reduce the incidence of injury, and to communicate this knowledge to scientists, coaches, clinicians, teachers, and participants. The target performance realms include not only the conventional areas of sports and exercise, but also fundamental motor skills and other highly specialized human movements such as dance (both sport and artistic). Sports Biomechanics is unique in its emphasis on a broad biomechanical spectrum of human performance including, but not limited to, technique, skill acquisition, training, strength and conditioning, exercise, coaching, teaching, equipment, modeling and simulation, measurement, and injury prevention and rehabilitation. As well as maintaining scientific rigour, there is a strong editorial emphasis on ''reader friendliness''. By emphasising the practical implications and applications of research, the journal seeks to benefit practitioners directly. Sports Biomechanics publishes papers in four sections: Original Research, Reviews, Teaching, and Methods and Theoretical Perspectives.