010-111 · Question #70
What of the following is the formula for calculating the heart rate reserve?
The correct answer is C. Client's maximum heart rate, minus their resting heart rate. Heart rate reserve (HRR) is defined by the Karvonen method as the difference between maximum heart rate and resting heart rate.
Question
What of the following is the formula for calculating the heart rate reserve?
Options
- A220, minus the age of the client
- B220, minus the resting heart rate
- CClient's maximum heart rate, minus their resting heart rate
- DClient's maximum heart rate, minus their age
How the community answered
(57 responses)- A4% (2)
- B9% (5)
- C72% (41)
- D16% (9)
Why each option
Heart rate reserve (HRR) is defined by the Karvonen method as the difference between maximum heart rate and resting heart rate.
220 minus age is the formula for estimating maximum heart rate (HRmax), which is an input to the HRR formula - not HRR itself.
220 minus resting heart rate does not correspond to any established exercise physiology formula.
The Karvonen formula calculates HRR by subtracting resting heart rate from maximum heart rate; this reserve is then used in target heart rate calculations by multiplying the desired intensity percentage by the HRR and adding resting heart rate back to the result.
Maximum heart rate minus age produces a meaningless value with no recognized application in exercise prescription.
Concept tested: Karvonen formula for heart rate reserve
Source: https://www.acsm.org/education-resources/books/guidelines-exercise-testing-prescription
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