THE STUDY OF RELATED FACTORS WITH BALL VELOCITY OF THROWING OF GIRLS AGED 11-12 YEARS OLD

  • W. H. Chiu
  • R. H. Tu
  • W. C. Chen
Keywords: overarm, the distance of back swing, the ratio between the distance of step and height, the angular velocities of joint.

Abstract

INTRODUCTION: The forceful overarm throwing is considered a fundamental movement for many skills. In addition, it is also regards as a characteristic of child’s development. As to the researches of development, gender difference is also concerned by experts of development. Research related to child motor development traditionally follow the structure of Burton’s (1992) on amendment of Development Sequences for Overhand Throwing table to measure throwing patterns. But overarm throwing is a kind of fast motion especially for the period which is from backswing to release. The traditional way mentioned above can’t provide detailed data. The purpose of the study was to find out the related factors with ball velocity of throwing of girls aged 11-12 years,