ACE Health Coach Certification Practice Test 2026 - Free Health Coach Certification Practice Questions and Study Guide

To determine the target heart rate (THR) range at 50-70% of heart-rate reserve for a 35-year-old with a resting heart rate of 75 bpm, it's essential to first calculate the heart-rate reserve (HRR). The HRR is determined by subtracting the resting heart rate from the maximum heart rate, which can be estimated using the formula: 220 minus age.

For a 35-year-old, the maximum heart rate would be:

220 - 35 = 185 bpm

Next, we calculate the HRR:

HRR = Maximum Heart Rate - Resting Heart Rate

HRR = 185 bpm - 75 bpm = 110 bpm

Now, to find the target heart rate range, we need to calculate 50% and 70% of the HRR and then add the resting heart rate back to these values.

Calculating 50% of HRR:

50% of HRR = 0.50 x 110 = 55 bpm

Target heart rate at 50% = Resting heart rate + 50% of HRR

= 75 bpm + 55 bpm = 130 bpm

Calculating 70% of HRR:

70% of HRR