The research aimed to identify the effectiveness of using SAQ exercises on some biochemical variables (beta-endorphins - muscle troponin - creatine kinase) and the level of attacking skill (speed and accuracy of pivot passes - the accuracy and power of shooting from a fall) for handball players under (20) years old. Among the most important results: The use of Sakio exercises S.A.Q has a statistically significant positive effect at the level of (0.05) on the biochemical variables (beta-endorphin - muscle troponin - creatine kinase) for handball players under (20) years old. - The use of SAQ exercises has a statistically significant positive effect at the level of (0.05) some physical variables (muscular capacity of the arms - muscular capacity of the two legs - agility - coordination between the eye and the ball - dynamic flexibility) and the level of offensive skill (speed and accuracy of the curvature passing by the center - accuracy and strength Shooting from falling) for handball players under (20) years old.