ACSM
010-111 · Question #32
010-111 Question #32: Real Exam Question with Answer & Explanation
The correct answer is D. Maximum heart rate - resting heart rate x 60% + resting heart rate. The Karvonen formula determines a target heart rate at a given intensity by calculating heart rate reserve and then adding resting heart rate back to the result.
Question
What is the formula to determine 60% of heart rate reserve?
Options
- A220 - age x 60%
- BMaximum heart rate x 60%
- CMaximum heart rate - resting heart rate x 60%
- DMaximum heart rate - resting heart rate x 60% + resting heart rate
Explanation
The Karvonen formula determines a target heart rate at a given intensity by calculating heart rate reserve and then adding resting heart rate back to the result.
Common mistakes.
- A. This option conflates the age-predicted max HR calculation with the HRR percentage and omits the resting heart rate component entirely.
- B. Multiplying maximum heart rate by 60% is the straight percentage-of-max method, not the Karvonen HRR method, and does not account for individual resting heart rate.
- C. This option correctly computes heart rate reserve but omits the final step of adding resting heart rate back, which would yield an inaccurately low and unusable target heart rate value.
Concept tested. Karvonen heart rate reserve target heart rate calculation
Reference. https://www.acsm.org/education-resources/books/guidelines-exercise-testing-prescription
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