Calculate the estimated maximum heart rate and moderate-intensity heart rate range for a 60-year-old using MHR = 220 − age. Provide the numerical moderate range (50–70% of MHR).

• A. MHR = 160 bpm; Moderate range = 70–120 bpm because 50% and 75% boundaries were used instead.
• B. MHR = 160 bpm; Moderate range = 80–112 bpm.
• C. MHR = 150 bpm; Moderate range = 75–105 bpm, based on subtracting 10 bpm for age adjustments differently.
• D. MHR = 180 bpm; Moderate range = 90–126 bpm because the age was mistakenly used as 40.

Answer: (B)