The VNS analysis uses heart rate variability (HRV) to measure the state of the autonomic nervous system and reveals how the body responds to stress, strain, and recovery. This ECG-accurate measurement provides precise insights into the balance between the sympathetic and parasympathetic nervous systems and can offer early indications of stress, exhaustion, and reduced recovery capacity. It is particularly suitable for people with high occupational or mental stress, sleep problems, or a desire for greater performance and balance. As a diagnostic tool, it forms the basis for deriving and sustainably optimizing individualized therapies, recovery measures, and longevity strategies.