Multiparameter study of the physiological reactions of the human organism to complex postural loads

Abstract

BACKGROUND: Reactions of human cardiovascular system to complex dynamic postural loads were under investigation by previous authors. Individual limiting mode of postural loads, i.e. alternating negative-positive periodic changes of body position angle on tilting table with regard to clinostatic position, was defined. It was demonstrated that application of oscillatory passive dynamic postural loads can cause certain hemodynamic reactions, which expression depend on postural loads dynamic characteristics and subjects primary state. AIM: Aim of the study is to develop comprehensive methodology (practice) that explores regulation mechanisms of cardiovascular, respiratory, central and autonomic nervous systems and their reactions to physiological strains with assigned properties (intensity, direction, periodicity and duration of postural loads). MATERIALS AND METHODS: 30 young healthy participants took part in the study. Physiological indicators were registered in dynamic mode synchronously with trajectory of participants motion. This study implemented common statistical methods as much as original means of analysis by integrating theory of dynamic systems. RESULTS: Evaluation of synchronously registered physiological indicators by means of instrumental and software application, in particular, postural loads protocols of various intensity and motion direction, showed that oscillatory passive dynamic postural mode allows considerable improvements in overall blood circulation and gas exchange in the lungs. These changes constitute in a rise of systemic and local blood flow without significant shift of arterial pressure, increased frequency of heartbeats and respiratory rate. CONCLUSIONS: Continuous monitoring of participants condition during complex postural loads give an opportunity for studying a set of physiological reactions and has a future implication in scientifically approved recommendations that describe practical use of postural loads as a correction technology for human health state and training.