The purpose of the study was to determine the role of rehabitaion exercises and whey protein in hamstring tear treatment of volley ball players injured with hamstring minor tears , they were diagnosed and divided to two equal groups (14volley ball players), Age between (18 : 23Y) ,group 1 treated with rehabitaion exercises and group 2 treated with rehabitaion exercises plus whey protein (30 grams) , twice daily, healing time , AST,ALT,UREA, creatinine concentrations, CPK, SOD, cortisol, together with isotonic leg muscle strength and pain scale were performed before and after rehabitaion exercises and exercises plus whey protein was detected . Blood sample (5 ml) was drawn for biochemiecal tests ,muscle strength was evaluated using dynamometer, pain test was evaluated, rehabitaion exercises were executed in three phases , one week each, the first stage was in negative rest and in positive rest during the other two stages after the suggestion of
specialists insport medicine, whey protein capsules (30gr,twice/daily), were ingested daily for three weeks. results revealed a reduction of protein metabolites in the two groups with a further decline after whey protein ingestions in case of muscle strength , there was a significant increase after whey protein ingestion plus exercises compared to rehabitaion exercises , also decreased creatine phosphokinase (CPK), aspartate, alanine transamilnase (AST,ALT) .In conclusion , whey protein administration induced faster healing time and a higher muscle strength together with lower pain test , it is recommended to use a supplement as whey
protein for the process of muscle healing together with the rehabitaion exercises.