010-111 · Question #31
What is the variability for any given age, when estimating a client's age-predicted maximum heart rate?
The correct answer is B. 10 to 12 beats per minute. The age-predicted maximum heart rate formula carries a variability of approximately 10 to 12 beats per minute, reflecting meaningful individual differences at any given age.
Question
What is the variability for any given age, when estimating a client's age-predicted maximum heart rate?
Options
- A2 to 4 beats per minute
- B10 to 12 beats per minute
- C18 to 20 beats per minute
- D22 to 24 beats per minute
How the community answered
(17 responses)- A12% (2)
- B82% (14)
- C6% (1)
Why each option
The age-predicted maximum heart rate formula carries a variability of approximately 10 to 12 beats per minute, reflecting meaningful individual differences at any given age.
A range of 2 to 4 bpm grossly underestimates the known standard deviation of the 220 minus age formula.
The widely used 220 minus age formula has a standard deviation of roughly plus or minus 10 to 12 bpm, meaning an individual's actual maximum heart rate may differ substantially from the estimate. This variability exists because genetics, fitness level, and other physiological factors influence true maximum heart rate. Practitioners should treat the formula as an approximation rather than a precise measurement.
18 to 20 bpm overestimates the typical variability reported in exercise science literature for this prediction equation.
22 to 24 bpm is too high and does not reflect the accepted standard deviation range associated with age-predicted maximum heart rate formulas.
Concept tested: Age-predicted maximum heart rate formula variability
Source: https://www.acsm.org/education-resources/books/guidelines-exercise-testing-prescription
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