1.Define heart rate reserve.
Heart rate reserve (HRR) is the difference between resting heart rate (HRrest) and maximum heart rate (HRmax).HRR = HRmax - HRrestHeart rate reserve is used when determining exercise heart rates. The Karvonen formula is used to calculate exercise heart rate at a given percentage training intensity. Add the given percentage of heart rate reserve to the resting heart rate.Exercise HR = % of target intensity (HRmax – HRrest) + HRrestFor example: Target intensity 70 % HRR for a person with HRmax 201 bpm and HRrest 50 bpmExercise HR= 70% (201-50=151) + 50
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