Relation between lift force and ball spin for different baseball pitches

Tomoyuki Nagami, Takatoshi Higuchi, Hiroki Nakata, Toshimasa Yanai, Kazuyuki Kanosue

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Although the lift force (FL) on a spinning baseball has been analyzed in previous studies, no study has analyzed such forces over a wide variety of spins. The purpose of this study was to describe the relationship between FL and spin for different types of pitches thrown by collegiate pitchers. Four high-speed video cameras were used to record flight trajectory and spin for 7 types of pitches. A total of 75 pitches were analyzed. The linear kinematics of the ball was determined at 0.008-s intervals during the flight, and the resultant fluid force acting on the ball was calculated with an inverse dynamics approach. The initial angular velocity of the ball was determined using a custom-made apparatus. Equations were derived to estimate the FL using the effective spin parameter (ESp), which is a spin parameter calculated using a component of angular velocity of the ball with the exception of the gyro-component. The results indicate that FL could be accurately explained from ESp and also that seam orientation (4-seam or 2-seam) did not produce a uniform effect on estimating FL from ESp.

Original languageEnglish
Pages (from-to)196-204
Number of pages9
JournalJournal of Applied Biomechanics
Volume32
Issue number2
DOIs
Publication statusPublished - 2016 Apr 1

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Baseball
Biomechanical Phenomena

Keywords

  • Angular velocity
  • Fastball
  • Flight trajectory
  • Forkball
  • Slider

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Biophysics
  • Rehabilitation

Cite this

Relation between lift force and ball spin for different baseball pitches. / Nagami, Tomoyuki; Higuchi, Takatoshi; Nakata, Hiroki; Yanai, Toshimasa; Kanosue, Kazuyuki.

In: Journal of Applied Biomechanics, Vol. 32, No. 2, 01.04.2016, p. 196-204.

Research output: Contribution to journalArticle

Nagami, Tomoyuki ; Higuchi, Takatoshi ; Nakata, Hiroki ; Yanai, Toshimasa ; Kanosue, Kazuyuki. / Relation between lift force and ball spin for different baseball pitches. In: Journal of Applied Biomechanics. 2016 ; Vol. 32, No. 2. pp. 196-204.
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