The target heart rate is 120.9bpm
The Karvonen Formula is a mathematical formula that is used to determine the target heart rate (HR) training zone at a particular exercise intensity. In order to get the target heart rate required, the expression needed make use of the maximum and resting heart rate with the desired training intensity given.
Mathematically, the target heart rate is expressed as:
Target Heart Rate = [(max HR − resting HR) × %Intensity] + resting HR
Given the following parameters
Resting HR = 75bpm
Maximum heart rate = 208 - (0.7xage )
Maximum heart rate = 208 -(0.7×45)
Max HR = 208-31.5
Max HR = 176.5pm
Exercise intensity = 60% = 0.6
Substitute the given parameters into the formula given above as shown:
Target Heart Rate = [(176.5 − 75) × 0.6] + 60
Target HR = (101.5×0.6)+60
Target HR = 60.9+60
Target HR = 120.9bpm
Therefore the target heart rate is 120.9bpm
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