A comparative study of the angular velocity of the knee joint between the front and back legs in the start of the 50m butterfly swim for the Iraqi national junior team swimmers

Abstract

The study aimed to ;

Recognize the differences in the angular velocity of the knee between the front leg and the hind leg in the start of swimming 50m butterfly for the Iraqi national junior team swimmers,The researchers used the descriptive approach in the manner of comparative studies due to its suitability and the nature of the problem, While the research sample consisted of (6) six swimmers representing the Iraqi national junior team, video imaging was used using a video camera placed on the right side of the swimmer to extract the variable speed for an angle using the (Kinovea) program, and the researchers used the statistical bag (SPSS) to extract the following means (standard deviation, arithmetic mean,coefficient of difference, T-test).