Investigating Complex Movements by Computer Simulation—Application to the Flip Long Jump

Abstract

Utilizing a comprehensive analysis and simulation procedure, the controversial flip long jump technique was simulated to determine the style's potential. Individual body segment simulation indicated that, during the ground phase of the takeoff stride, an arms down and stop action coupled with a modified running action by the legs created the most favorable segment reactions. These segment motions, coupled with a trunk action that emphasized body rotation, produced world class jump results by the simulated performer. However, performance drawbacks inherent in the flip technique indicated that the style cannot be deemed superior to the conventional style of long jumping. To produce the rotation necessary to complete the flip while airborne, it was necessary to moderate forces that generated vertical velocity in both the recovery and the driving phases of the takeoff stride due to the concurrent production of unwanted backward rotation by these forces. This loss of vertical velocity led to a low takeoff angle, which offset any unique performance gains present in the flip jump technique.