UDC

[612.176.4+612.821+371.12](045)

Authors

Poskotinova Liliya Vladimirovna, The Institute of Environmental Physiology, Ural Branch of the Russian Academy of Sciences; Northern (Arctic) Federal University named after M.V. Lomonosov (Arkhangelsk, Russia) 

Abstract

The authors performed a dynamic observation of 15 teachers of secondary vocational education with over 20 years’ experience during 10 sessions of heart rate variability (HRV) biofeedback training. Each session included recording initial heart rate (5 min) and biofeedback training to increase the total power spectrum of HRV (total power, TP), also 5 min. The levels of anxiety and types of autonomic nervous system reactivity at biofeedback training were determined. In the total sample of the subjects, anxiety significantly decreased after biofeedback training compared to its initial levels. With the first reactivity type, the greatest increase in TP index was observed during the first session (by the factor of 2.5–5 compared to the initial value). By the 3rd and 5th sessions it decreased and remained relatively stable up to the 10th session. The second type of HRV reactivity was identified in teachers with the highest initial level of anxiety and the maximum contribution of very low spectral component of HRV. For these subjects, biofeedback training proved least effective during the first 3–5 sessions, with TP index increasing, on average, by the factor of 2–3 compared to the initial values. For the third type of autonomic nervous reactivity, the effect of HRV biofeedback training was unstable, with the sympathetic activity virtually unchanged from the 1st to the 10th session. The results obtained can be used to develop new guidelines for medical specialists in order to introduce this method of HRV biofeedback training among teachers with a long work record.

Keywords

heart rate variability, biofeedback, teachers of secondary vocational education, work record, anxiety level.

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