Allen (EPA)

Allen (EPA) refers to the Allen variability ratio, a measurement used to analyze heart rate variability and autonomic nervous system function. It compares the regularity of heartbeats over time, helping to assess how well the body is managing stress and maintaining balance between the sympathetic (fight-or-flight) and parasympathetic (rest-and-digest) nervous systems. A higher Allen (EPA) value indicates more stable heart patterns, suggesting better autonomic regulation, while a lower value may point to stress, fatigue, or potential health issues. It is a valuable tool in health monitoring, especially in stress management and cardiovascular health.