The research aimed to identify a comparison work between the skills of the front and back counterstrike in the kinematic characteristics of the upper limb and its relationship to the speed of the ball by reaching the most important kinematic characteristics of the striking arm during the performance of the skills of the front and back counterstrike and its relationship to the speed of the ball during the weighted and collision moments, and the researcher used the descriptive approach using analysis Two-dimensional biomechanical on a sample of (20) players at the level of the Republic, where the high technical level is available, which allows the performance of the front and rear cross-kick skills with the best performance. The number of attempts that were analyzed and subjected to statistical treatments (20) attempts. Among the research tools: Restameter Pe3000 to measure height to the nearest cm - Medical scale Standards for measuring weight Medical scale for weight in kilograms - Legal squash court + squash racket + squash ball. The researcher used the statistical treatments used: the skew coefficient - the simple correlation coefficient (Pearson). Among the most important results: • The average horizontal and vertical velocities during the performance of the front kickback skill is greater than the average horizontal and vertical speeds during the performance of the backhand kick skill, except for the horizontal velocity of the bat during its weighted moment. • Angle values of the striking arm during the performance of the front crosshand skill are greater than the values of the angles of the striking arm during the performance of the backhand skill during the weighting moment. Among the most important recommendations: • Focusing on the kinetic speed exercises of the striking arm during the performance of the frontal and rear cross-kick skills through movement around the vertical axis, in order to develop the performance of the preliminary weighting stage and return to the direction of the ball before hitting it. • Focusing on paying attention to opening the corners of the striking arm during the performance of the front crosshand skill, while closing the corners of the striking arm during the performance of the backhand skill during training.