A KINEMATC COMPARISON BETWEEN THE SEMI-FINALS AND THE FINAlS FOR 50M SWIMMING RACES OF THE FOUR STROKES

Abstract

The purpose of this study was to identify the kinematical variables that had a significant effect on total time between Semi-finals and Finals for SOm races of the four strokes. Finalists who had their best total time registered at the Semi-finals were chosen as the subjects in this analysis and they were (44) swimmers. The term "negative swimmers" was given to these subjects. The kinematics variables used in this analysis were: total time(TT), start time (ST), free swimming speed (Av.V), last Sm of the race (Sm Fin.), first half swimming speed(V1), second half swimming speed (V2), stroke length (SL) and stroke rate (SR).Results revealed that the most kinematical variables that might affected the (TT) were SR, SL and V2. An attempt of explaining the improper combination between SL and SR through the second half of the race was stated.