Vegetative homeostasis

Autonomic homeostasis is estimated by the values of the variational range, mode amplitude, and stress index with the determination of conditions of moderate or pronounced predominance of the sympathetic nervous system, preservation of autonomic homeostasis, moderate or pronounced predominance of the parasympathetic nervous system.

Source: http://csp-athletics.ru/images/doc/metod/control/metod-control-10.pdf