
What is Heart Rate Variability?
Heart rate variability HRV is simply a measure of the variation in time between each heartbeat. When at rest, a healthy heart speeds up as you inhale, and slows down as you exhale. These moment-to-moment changes between heart beats are a telling measurement of nervous system health in terms of physical, emotional and mental function. This is controlled by our autonomic nervous system (ANS), located in the brain stem. The upper cervical spine surrounds the lower portion of the brain stem. The ANS regulates our heart rate, blood pressure, breathing and digestion. Analysing HRV offers us a view into how the ANS is being regulated. If an individual’s system is more stressed/sympathetic, then the HRV tends to be lower whereas in a more relaxed state HRV may be higher. Studies show high HRV is associated with better recovery following exertion, higher resilience to psychophysiological disorders, as well as positive feelings and outlook on life. Stress, especially when prolonged, decreases heart rate variability.Signs of low heart rate variability:
- Heart problems: Conditions such as coronary heart disease, hypertension, ventricular arrhythmia and heart failure. Low HRV has been associated with an increased risk of atrial fibrillation, ventricular tachycardia, and even sudden cardiac death following a heart attack.
- Psychological problems: Changes in ANS function have been observed in a variety of psychological disorders, including posttraumatic stress disorder (PTSD). This is also common in depression and anxiety disorders and HRV is now being used as a biomarker in the clinical setting as an objective measuring tool.
- Nutrition: Alcohol has been shown to potentially decrease HRV for up to five days. Poor diet and nutrition have also been shown to decrease HRV, as does eating at irregular times.
- HRV and Symptoms improve with Chiropractic Care –https://www.naturalwaychiro.org/heart-rate-variability-and-symptoms-improved-with-chiropractic/