heat exposure strengthens heart muscle contraction force in the hours after a session
Dry-sauna treatment produced a significant increase in the Heather index (HI) of myocardial contractility from 0.34 to 0.41 1/s² at 3 hours post-exposure (P=0.0238), suggesting a delayed positive inotropic effect.
What this means for you
Your heart is a muscle, and like other muscles it responds to the right kind of stress. This finding suggests that heat exposure can increase the force of each heartbeat — not during the session, but in the hours that follow. For most people, a stronger, more efficient heartbeat supports circulation, energy, and cardiovascular resilience over time.
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.