The Karvonen Formula
This is a heart rate reserve formula and it’s one of the most effective methods used to calculate training heart rate. The formula factors in your resting heart rate, so you will need to determine your resting heart rate by doing the following:
- Prior to getting out of bed in the morning, take your pulse on your wrist (radial pulse) or on the side of your neck (carotid pulse).
- Count the number of beats, starting with zero, for one minute. If you don’t have a stop watch or a second hand in your bedroom, you can measure the time by watching for the number to change on a digital alarm clock. Find your pulse and start counting when the minute number changes the first time, stop counting when it changes again.
- To help assure accuracy, take your resting heart rate three mornings in a row and average the 3 heart rates together.
High fitness level . . . . . . . . . . . 75% - 85%
The Karvonen Formula: 220 - Age = Maximum Heart Rate
- For example, Sally is 33 yrs old, has a resting heart rate of 75 and she’s just beginning her exercise program (her intensity level will be 50% - 60%.) Sally’s training heart rate zone will be 131-142 beats per minute:
- Sally's Minimum Training Heart Rate:
220 - 33 (Age) = 187
187 - 75 (Rest. HR) = 112
112 x .50 (Min. Intensity) + 75 (Rest. HR) = 131 Beats/Minute
Sally's Maximum Training Heart Rate:
220 - 33 (Age) = 187
187 - 75 (Rest. HR) = 112
112 x .60 (Max. Intensity) + 75 (Rest. HR) = 142 Beats/Minute
220 - 33 (Age) = 187
187 - 75 (Rest. HR) = 112
112 x .60 (Max. Intensity) + 75 (Rest. HR) = 142 Beats/Minute












