This study aims to identify the impact of using Swiss ball exercises on increasing some physical parameters and level of performance in gymnastics of (30) female students of the fourth grade in the Faculty of Physical Education at the University Sadat City. A pretest post-test, control group design was used in which a (range of motion of the spine, hum strings, pelvis , muscle power arms, legs , balance, and strength of the abdominal muscles) and to learn some skills ( Forward Handspring and

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... k Ward) before and after eight weeks with two sessions . The experimental group (n=15) followed an eight weeks Swiss ball exercises program while the controls ( n=15) received no intervention. the research tools were physical tests, level skill tests, and exercises program with Swiss ball , the researcher has been used statistics treatment ( the arithmetic mean, standard deviation, simple correlation coefficient, and (T) test, the improvement rate , and the most significant results that exercises with Swiss ball had been used in the research led to differences in improvement between the two groups experimental and control groups for the experimental group in the physical variables (the flexibility, muscle strength, muscle power and balance) ranged between (21.38% : 53.81%) , and in the level of performance skills back walkover and the front handspring as the percentage of improvement between the two groups ranged as follows (23.87% : 26.51%).