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Kinematic and kinetic factors related to the standing long jump performance

Abstract:

A group of 64 male subjects (aged 19-21 years) volunteered as subjects for examination of kinematic and kinetic factors related to the performance of the standing long jump. The maximal normalized peak force magnitude for vertical, horizontal and resultant force were 2,27 ± 0.23, 0.63 ± 0.09 and 2.35 ± 0.24 times body weight, respectively. Takeoff velocity of the Centre of Gravity was of 4,04 ± 0.46 m/s with the corresponding angle of takeoff being 25° ± 5. No significant correlation was found between the kinetic and kinematic variables analyzed in the jump, which demonstrated a great interindividual variation in the patterns of force application. Maximal force produced in the vertical direction was found to be the most correlated variable (p < 0.05) to jumping performance. From a qualitative point of view, the appearance of one or two (or more) peaks in the subject's vertical force-time curve could explain the low correlation between variables. Therefore, influence of aspects such as coordination of movement and technique in the jumping performance could be of greater importance to the outcome than the dynamic explosive force production attained by the individual. © 1997 Teviot Scientific Publications.