Karvonen Formula is a mathematical formula that helps you determine your target heart rate zone

Karvonen Formula is a mathematical formula that helps you determine your target heart rate zone. The formula involves using your maximum heart rate (MHR) minus your age to come up with a target heart rate range (which is a percentage of your maximum heart rate). Calculate your target heart rate using the Karvonen method. What should your heart rate be at high intensity such as 85%?