### Abstract

The effectiveness of fastballs of equivalent speed can differ; for example, one element of this difference could be due to the effect of rate and orientation of ball spin on launched ball trajectory. In the present experiment, baseball batters' accuracy in hitting fastballs with different backspin rates at a constant ball velocity of 36 m/s was examined. Thirteen skilled baseball players (professionals, semiprofessionals, and college varsity players) participated in the study. The movements of bat and ball were recorded using two synchronized high-speed video cameras. The Pearson product-moment correlation coefficient (r) was calculated and used to analyze the relationship between ball backspin rate and the vertical distance between ball center and sweet spot at the moment of ball-bat impact. Ball backspin rate was positively correlated with increases in the distance from the optimal contact point of the swung bat (sweet spot) to the actual point of contact (r = .38, P < .001). Batters were most effective at the usual backspin rate for the ball velocity used. The decrease in accuracy of the batter's swing that was observed when the fastball's backspin deviated from the usual rate likely occurred because experienced batters predict ball trajectory from perceived ball speed.

Original language | English |
---|---|

Pages (from-to) | 279-284 |

Number of pages | 6 |

Journal | Journal of Applied Biomechanics |

Volume | 29 |

Issue number | 3 |

Publication status | Published - 2013 Jun |

### Fingerprint

### Keywords

- Ball spin rate
- Batting performance
- Pitch trajectory

### ASJC Scopus subject areas

- Orthopedics and Sports Medicine
- Biophysics
- Rehabilitation

### Cite this

*Journal of Applied Biomechanics*,

*29*(3), 279-284.

**The effect of fastball backspin rate on baseball hitting accuracy.** / Higuchi, Takatoshi; Morohoshi, Jun; Nagami, Tomoyuki; Nakata, Hiroki; Kanosue, Kazuyuki.

Research output: Contribution to journal › Article

*Journal of Applied Biomechanics*, vol. 29, no. 3, pp. 279-284.

}

TY - JOUR

T1 - The effect of fastball backspin rate on baseball hitting accuracy

AU - Higuchi, Takatoshi

AU - Morohoshi, Jun

AU - Nagami, Tomoyuki

AU - Nakata, Hiroki

AU - Kanosue, Kazuyuki

PY - 2013/6

Y1 - 2013/6

N2 - The effectiveness of fastballs of equivalent speed can differ; for example, one element of this difference could be due to the effect of rate and orientation of ball spin on launched ball trajectory. In the present experiment, baseball batters' accuracy in hitting fastballs with different backspin rates at a constant ball velocity of 36 m/s was examined. Thirteen skilled baseball players (professionals, semiprofessionals, and college varsity players) participated in the study. The movements of bat and ball were recorded using two synchronized high-speed video cameras. The Pearson product-moment correlation coefficient (r) was calculated and used to analyze the relationship between ball backspin rate and the vertical distance between ball center and sweet spot at the moment of ball-bat impact. Ball backspin rate was positively correlated with increases in the distance from the optimal contact point of the swung bat (sweet spot) to the actual point of contact (r = .38, P < .001). Batters were most effective at the usual backspin rate for the ball velocity used. The decrease in accuracy of the batter's swing that was observed when the fastball's backspin deviated from the usual rate likely occurred because experienced batters predict ball trajectory from perceived ball speed.

AB - The effectiveness of fastballs of equivalent speed can differ; for example, one element of this difference could be due to the effect of rate and orientation of ball spin on launched ball trajectory. In the present experiment, baseball batters' accuracy in hitting fastballs with different backspin rates at a constant ball velocity of 36 m/s was examined. Thirteen skilled baseball players (professionals, semiprofessionals, and college varsity players) participated in the study. The movements of bat and ball were recorded using two synchronized high-speed video cameras. The Pearson product-moment correlation coefficient (r) was calculated and used to analyze the relationship between ball backspin rate and the vertical distance between ball center and sweet spot at the moment of ball-bat impact. Ball backspin rate was positively correlated with increases in the distance from the optimal contact point of the swung bat (sweet spot) to the actual point of contact (r = .38, P < .001). Batters were most effective at the usual backspin rate for the ball velocity used. The decrease in accuracy of the batter's swing that was observed when the fastball's backspin deviated from the usual rate likely occurred because experienced batters predict ball trajectory from perceived ball speed.

KW - Ball spin rate

KW - Batting performance

KW - Pitch trajectory

UR - http://www.scopus.com/inward/record.url?scp=84882985377&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84882985377&partnerID=8YFLogxK

M3 - Article

VL - 29

SP - 279

EP - 284

JO - Journal of Applied Biomechanics

JF - Journal of Applied Biomechanics

SN - 1065-8483

IS - 3

ER -