The significance of heart rate variability (HRV) in health monitoring lies in its ability to gauge autonomic nervous system balance and overall health status. High HRV is often indicative of a well-functioning cardiovascular system and good physiological resilience, while low HRV may suggest stress or underlying health issues. Monitoring HRV can help identify patterns related to stress, recovery, and overall fitness levels. By understanding HRV, individuals can make informed lifestyle changes to enhance cardiovascular health and overall wellness.