What are the 5 heart rate zones?
What are the 5 heart rate zones? What Are the Five Heart Rate Zones? Zone 1: 50 percent to 60 percent of MHR. Zone 2: 60 percent to 70 percent of MHR. Zone 3: 70 percent to 80 percent of MHR. Zone 4: 80 percent to 90 percent of MHR. Zone 5: 90 percent to […]