Check a training-log calculation. Given age 35, resting HR 60 bpm, fraction 0.4; HRmax = 220 − age; target = rest + fraction × (HRmax − rest), what is the result? Report to 1 decimal place(s) in bpm. Not an individual measured maximum or diagnosis.
- A109.4 bpm
- B74.0 bpm
- C110.0 bpm
- D134.0 bpm
Show answer and explanations
Answer
C
HRmax = 220 − 35 = 185; HRR = 185 − 60 = 125; target = 60 + 0.4 × 125 = 110.0 bpm. Another common population estimate is Tanaka HRmax = 208 − 0.7 × age. Use the equation specified here; neither estimate is an individual measured maximum.
A
This substitutes Tanaka HRmax (208 − 0.7 × age) for the specified 220 − age.
B
This takes the fraction of HRmax (%HRmax) instead of applying it to heart-rate reserve.
D
This adds resting HR to fraction × HRmax without first subtracting resting HR from HRmax.
C
HRmax = 220 − 35 = 185; HRR = 185 − 60 = 125; target = 60 + 0.4 × 125 = 110.0 bpm. Another common population estimate is Tanaka HRmax = 208 − 0.7 × age. Use the equation specified here; neither estimate is an individual measured maximum.