Abstract: Determine the effects of Hypoxic training Exercises its one of training without breathing or low percent of Oxygen with decrease of rate of breathing our study aim to know the effect of Hypoxic training on Arthrobioten hormone in blood when knowing the effect of some physical tests as leg push of ,swimming to 25 m, push off and swimming at 10 m,>and some of physiological variables as Pulls ,Vo2 max,VC.and Some of Biochemistry tests as hematocrits ,Arithrobroten, on subject of 20 lifeguards from Assiut Gov. age between 22-24 year .it was a different significant between the subject pre and post