چکیده (انگلیسی):

The purpose of the present study was to determine the biomechanical indicators of jump height among varied techniques of vertical jump and examine if the rate of force development is a valid indicator for vertical jump height or not. Fifteen male high level athletes participated in this study performed three techniques of the vertical jump. Motion data were recorded by a high-speed camera at a frequency of 250 Hz, video point v 2.5 2D motion analyses for kinematic variables, and force platform (MP4060®, Bertec Corporation, Columbus, OH, USA) which measured the ground reaction force at a sampling rate of 1000 Hz. The RFD was calculated as the Peak Force divided by the time taken to achieve the Peak Force, the integration was calculated by OriginPro 8.5 to calculate impulse and work. The results showed a significant difference between techniques in all analyzed variables, a positive significant correlation between vertical velocity, impulse, work, temporal variables with flight height, and the negative significant correlation between the rate of force development with flight height and jump techniques. In Conclusion, this results emphasized the importance of velocity, impulse, and work as indicators when evaluating the vertical jump.