during Exercise. Heart Important know rate Studio SWEAT onDemand Why? Workout? YOUR Zones Is it IMPORTANT to know your HEART RATE during a WORKOUT? Why? Heart Rate Zones and Exercise. &q=exercising+heart+rate Cat Kom, Bethany, and Brian teach you how to calculate your heart rate zones, which calculations are best, what the zones… Friday, April 6, 2012 Add Comment Edit