الملخص

The research aims to identify the effect of weight lifting and polymetric exercises in a contrastive style to develop the strength of leg muscles for the basketball players and it assumed the existence of a positive effect in weight lifting and polymetric exercises in a contrastive style in developing vertical and horizontal jump in stability of basketball players on the Anbar province team in a number of (12) players and the study concluded that: using weight lifting and polymetric exercises in a contrastive style to develop the muscles of basketball player legs. And it was effective in a positive figure to develop this feature and the study recommended the necessity of focusing on contrastive exercises in using polymatric and weight lifting exercises which has effectiveness to develop physical ability related to basketball.