The researcher " Shireen Ahmed Taha Hassan" a study aims to identify (Effect of a training program for center strengthon sensory receptors and some Chemical variables have special Physical abilities and level Performance of the Wall block in Volleybahll), The researcher used the experimental method of design with a pre-post measurement, The sample included (20) juniors, who were divided into two groups, one of them the experimental and the other control the strength of each of them (10) juniors, This program have continue for (10) weeks by (3) units per-week, , The results of this study showed that the practice of rhythmic exercises led to advance and tangible improvement in some of the chemical variables under consideration, namely (The Eenzyme Choline Estrase –Gglucose –Lactic Acid), It also resulted in an improvement and positive results in the special physical abilities and skill under consideration, The researcher recommended that the need to implement the proposed program using the strength training of the center on the faculties of physical education because it has a positive effect on the different physiological, physical and skill aspects.