The autonomic nervous system governs rhythmic fluctuations in blood pressure and heart rate, which are influenced by breathing patterns. This study aims to explore how different breathing techniques, specifically Kapalbhati (fast-paced breathing) and Slow Deep Breathing (SDB), affect heart rate variability (HRV). This study was conducted in the Department of Physiology and AYUSH at AIIMS Bhopal, India and duration was 2 (Two) months from May 2021 to June 2021 This quasi-experimental study involved 60 participants divided into two groups: Kapalbhati and SDB. Results showed significant differences in HRV, with Kapalbhati inducing sympathetic dominance and SDB promoting parasympathetic activity. These findings suggest that SDB may enhance relaxation and longevity, while Kapalbhati could aid in weight loss by boosting metabolism.