
Target heart rate (THR), or training heart rate, is a desired range of heart rate reached during aerobic exercise which enables one's heart and lungs to receive the most benefit from a workout. This theoretical range varies based on one's physical condition, age, and previous training.
There are many methods to calculate one's Target Heart Rate. One simple subjective measurement method is Talk Test method.
Talk Test Method
The talk test method is subjective and should be used in conjunction with taking a pulse. The talk test is quite useful in determining your comfort zone of aerobic intensity, especially if you are just beginning an exercise program. If you are able to talk during your workout without a great deal of strain, you’re most likely in your comfort zone. Work at an intensity that allows you to breathe comfortably and rhythmically throughout all phases of your workout. This will ensure a safe and comfortable level of exercise.