heat exposure shifts the nervous system from rest mode toward active recovery
Dry-sauna exposure significantly decreased the high-frequency component of heart rate variability (HF-RRI) from 1643.8 to 493.6 ms² immediately after exposure (P=0.0313), indicating reduced parasympathetic activity.
What this means for you
During a heat session, your body temporarily dials down its 'rest and digest' signals — a normal part of how it responds to thermal stress. This shift is part of the adaptation process that, over time, may support cardiovascular resilience and help your system become more responsive to stress and recovery cycles.
The published research
This page describes a documented finding about the underlying wellness technology. It is not a marketing claim about any specific device. For information about HOCATT specifically, visit hocatt.com.