Contribution for human body behaviour research at the time of a jump reception

The paper studies the initial phase associated to human body flexion, at the time of a jump reception, beginning with standing up position. It views the modelling of vertical efforts induced at the hand and feet interface levels of a vehicle drive post, according to a series of trials. The trial rig contains a driving post, connected with a float where the assayer is sitting down. The float moves vertically and is provided with an adjustable height, and at full stroke the float movement is absorbed by a pneumatic suspension with adjustable design features. The instrumentation of interfaces with the pilot gives readings of the components of efforts and absolute acceleration