passive heating shifts central blood volume and increases cardiac ejection fraction
Passive heating increases central blood volume and alters ventricular dimensions in humans, as demonstrated by echocardiographic measurements during heat stress.
What this means for you
When your heart pumps out a greater share of blood with each beat, your cardiovascular system is working more efficiently. This kind of cardiac response — seen during whole-body heat exposure — is associated with better circulation, improved oxygen delivery, and the kind of cardiovascular conditioning most people connect with feeling more energetic and resilient over time.
The published research
Blood flow distribution during heat stress: cerebral and systemic blood flow.
Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2013
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