A Study on the Triple Jump with Short Approach Run.

Abstract

The purpose of this study was to know the differences of the Vertical Velocity, Horizontal Velocity, Angle of Projection and Distance of the three phases in the triple jump during approach run at various speeds. Two subjects (who were a middle trained jumper of 18 years old, and a little trained jumper of 16 years old) were employed in this experiment. Takeoff angle of projection of the Hop, Step, Jump and vertical velocity of the Step phase tended to gradually decrease according to the increase the length of the approach run. Jumping distance for each horizontal velocity in the Step phase was shortest. And difference of the rate detween distance ratio of the Hop and distance ratio of the Step was longer in beginner than trained. Record jump analysis of the triple jump, especialy closely related to the Hop phase was increase according to the increase the length of the approach run. And relative length of the Jump Phase was longer in case of the short length of the approach run. The rate by (A) Jumping Distance to (B) Jumping Distance per Horizontal Velocity, were about equal rate in the Step phase, (A)>(B) in the Hop phase, and (A)<(B) in the Jump phase.