After reading the section on Target Heart Rate Zone, please find your target heart rate zone. What is the low end of your training zone (65%)? What is the upper end of your training zone (90%)? To help monitor your heart rate during exercise, find your 15 second count range for the above numbers (divide each by 4). No need to write full sentences for this question, you only need to include the maximum heart rate equation, equations to find your target heart rate zone (65-90%), and 15 second count range (this is a range so it should include 2 numbers).