Responses of the human body to external loads, in addition to a large number of physiological factors, are connected to recognizing the changes in intra-abdominal pressure. A functional correlation between the so called lumbar moment at the levels of L4/L5 vertebrae and the intra-abdominal pressure has been undoubtedly established. Biomechanical solution came down to forming a suitable biomechanical model which is fundamentally a linear model, and from there the adequate results follow, which are, beside being linear, at the same time nearly symmetrical for both hands. This fact was a stimulus to research, in particular what kind of influence spatial effect of external loads can have, considering also the segmental weights of human body parts and the other weights in the process, on the intra-abdominal pressure in passengers during boarding and exiting airplane passenger area. Research was done on the spatial changes in biomechanical characteristics of virtual humanoid character models and movements of analogue biodynamical and technical systems, based on real anthropomorphic and biomechanical measurements of the human body in our population, inside virtual 3D spaces for the purpose of analyzing their function in real conditions of airplane environment. Furthermore, on the basis of performed anthropometric and biomechanical measurements, we investigated the so far insufficient influence of personalized body geometry and dimensions, as well as body positions during human activities performed in ergonomic and biomechanical clutching actions within airplane systems while using surrounding elements which come into immediate physical contact with the human body or surround it during performing regular working activities, for the purpose of accurate defining of dimensions of ideally shaped airplane environment for every individual separately. Research was conducted on digitally obtained anthropometric measurements and 3D dynamic changes in biomechanical characteristics of people during moving and inaction inside airplane passenger area.