Earticle

초록

영어

Compared to upper extremity function, the changes in lower extremity function with increasing numbers of pitches have not fully been investi-gated in baseball pitchers. In addition, little is known about the correla-tion between lower extremity function and pitching performance. The purpose of this study was to evaluate the effect of fatigue on lower ex-tremity function and pitching performance in a simulated baseball game. Eighteen collegiate baseball pitchers threw 117 pitches in 9 in-nings (13 pitches per inning) with 5-min rest between innings at an offi-cial pitching distance in a simulated game. Isometric hip muscle strength (abduction and adduction) and squat jump performance (height, mean/peak power, and mean/peak velocity) were measured before and after the game. The mean ball velocity and pitching accura-cy were assessed per inning. Ball velocity significantly decreased in the 7th (P=0.026) and 9th (P=0.001) innings compared to the 1st inning, but pitching accuracy did not change significantly. Hip abduction (P=0.009) and adduction (P=0.001) strength significantly decreased af-ter the game, but squat jump performance did not significantly change before and after the game. A significant correlation between decreased ball velocity in the 9th inning and decreased hip adduction strength was found (P=0.011, r=0.583). Our findings suggest that hip abduction and adduction strength are susceptible to fatigue owing to repetitive throw-ing motions and that hip adduction strength, especially, is an important physical fitness factor for maintaining ball velocity during a game in baseball pitchers.

목차

Abstract
 INTRODUCTION
 MATERIALS AND METHODS
  Participants
  Pitching protocol
  Pitching performance
  Hip abduction and adduction strength
  Squat jump
  Statistical analysis
 RESULTS
  Pitching performance
  Hip muscle strength and squat jump
  Correlations between lower extremity function and pitching performance
 DISCUSSION
 CONFLICT OF INTEREST
 ACKNOWLEDGMENTS
 REFERENCES

키워드

저자

• Osamu Yanagisawa [ Faculty of Business Information Sciences, Jobu University, Isesaki, Japan ] Corresponding author
• Hidenori Taniguchi [ Faculty of Business Information Sciences, Jobu University, Isesaki, Japan ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  JER [Journal of Exercise Rehabilitation]

• 간기

  격월간

• pISSN

  2288-176X

• eISSN

  2288-1778

• 수록기간

  2013~2026

• 등재여부

  SCOPUS,KCI 등재

• 십진분류

  KDC 517 DDC 613