Chronodiagnostical methods for evaluating reserve and unfavourable responses of human cardiac function and under prolonged stress load.

The challenge of aging and supporting active long healthy life of a human is treated herein in the context of the chronobiological theory of bio-system stability. An increase in the energetic efficiency of the structural regulation in the feedback and adapting process of a bio-system results in a reduction of its homeostatic capacity and inhibition of its bio-rhythms.