Cardiographic changes in acute hypoxia after intermittent hypoxic training in humans

One of the important areas of research in physiology and medicine is the impact of intermittent hypoxic training on human resistance to exogenous and endogenous environmental factors. Special attention is also paid to cardiac activity. The aim of the paper is to examine the nature and conjugation of human heart bioelectrical processes in acute hypoxia after intermittent hypoxic training. Materials and methods. A 20-minute test with acute hypoxia (AH 12.3 % O2) was conducted on 29 males, aged 20.2±0.31, at different periods after 16-day-hypoxic training. Blood saturation (SpO2%), amplitude and time ECG parameters were determined. Results. At rest, at certain periods after hypoxic training, we observed an increase in R-R (Day 1, p=0.020), Q-T (Day 1, p=0.005; Day 16, p=0.043) and a decrease in P-Q (Day 7, p= 0.016) compared to the control. In case of acute hypoxia there was a decrease in P1II (Day 1, p=0.019; Day 7, p