Heart Rate Variability (HRV)
Heart rate variability (HRV) refers to the variation in the time intervals between consecutive heartbeats. It is a measure of the autonomic nervous system’s (ANS) activity, which controls various bodily functions, including heart rate.
Mechanism
The ANS consists of two branches
Sympathetic branch
Activates during stress or fight-or-flight situations, increasing heart rate
and HRV.
Parasympathetic branch
Activates during stress or fight-or-flight situations, increasing heart rate
and HRV.
IMPORTANCE
HRV is a valuable indicator of
Cardiovascular health
Low HRV may be associated with an increased risk of heart disease, stroke, and other cardiovascular problems.
Autonomic nervous system function
HRV reflects the balance between the sympathetic and parasympathetic branches, providing insights into overall stress levels and adaptability.
Mental health
HRV can be affected by mental health conditions such as anxiety and depression.
Age
HRV tends to decrease with age.
MEASUREMENT
HRV can be measured using various methods, including
Electrocardiogram (ECG)
A medical test that records the electrical activity of the heart.
Smartphone apps
There are several apps that use the phone's microphone or accelerometer to estimate HRV.
Heart rate monitor
A device that tracks heart rate and can calculate HRV.
INTERPRETATION
A higher HRV generally indicates better health and autonomic
balance.However, the optimal HRV value varies depending on factors such as
age, fitness level, and stress levels. It’s important to consult with a healthcare
professional for a proper interpretation of HRV measurements.