스트레스 반응 수준에 따라 인지스트레스와 호흡훈련이 정신건강과 심박변이도에 미치는 영향

Abstract

Purpose: The present study investigated whether stress and ventilatory training (VT) have different effects on psychophysiological responses according to the magnitude of the stress response. Method: Participants were twenty-three college students with a high-stress response and twenty-three with a low-stress response. Psychological tests (depression, anxiety, stress response, and resilience), heart rate variability (SDNN, RMSSD, total power, LF, HF, and LF/HF ratio), and visual analogue scale (anxiety, stress, confidence, and relaxation) were measured at rest, after cognitive stress, and after ventilatory training. Results: High-stress group showed higher depression, trait, state anxiety, and lower resilience compared to the low-stress group. The high-stress group showed higher VAS anxiety and stress, and lower relaxation and self-confidence scores. Computational task increased stress and decreased heart rate and RMSSD. VT not only lowered anxiety and stress, increased relaxation and confidence, but also increased SDNN, RMSSD, total power, and LF. However, there was no significant difference between the stress response groups in all variables before and after the stress task and ventilatory training. Conclusion: VT seems to be an effective way to restore the balance of the autonomic nervous system caused by stress.