Background: Handball is a fast-moving, intensely competitive sport. The game requires a lot of running, jumping, and throwing, which is quite taxing on the body. Playing handball requires a specific set of skills and talents. Identifying the performance metrics, such as throwing technique and jumping ability, can be aided by understanding biomechanical elements. In order to produce diverse handball shots, it is crucial to comprehend varied angles of up thrust or supporting leg. Objective: To investigate and assess the maximum flexion angle of the knee joint of the up-thrust leg and its relationship to the player’s flight duration during vertical jump shot.