<http://schema.org/description>
"Overdosing on high intensity exercise may actually increase the risk of death from a heart attack or stroke in those with existing heart disease, suggests German research published online in the journal Heart."^^<http://www.w3.org/2001/XMLSchema#string>
<http://medicalxpress.com/news/2014-05-prolonged-high-intensity-heart-health.html>