الملخص

The aim of this research is to know the significance of differences of some aspects of muscle power of arms and legs muscles among volleyball and basketball players . The method adopted was descriptive due to its appropriateness to nature of study .The sample was (18) players from Mosul University volleyball and basketball teams divided into (9) players for each team .The measurements of aspects of muscle power like (explosive strength of arms and legs muscles , speed strength of arms and legs muscles and strength endurance of arms and legs muscles) were done . Data were collected by analyzing content , surveys , measurement and tests then statistically dealt with by using (Mathematical means , Standard deviation and T test ).