Question

question 3 / 5 if someone is 40 years old trying to lose fat, what low and high percentage would she use to build her aerobic capacity? a. 70%-80% b. 50%-60% c. 60%-70% d. 80%-90%

Explanation:

To determine the aerobic capacity percentage range for fat loss, we refer to fitness guidelines. For fat loss and aerobic capacity building, the target heart rate (THR) percentage range is typically 60% - 70% of maximum heart rate (MHR). The MHR for a 40 - year - old is calculated as \(220 - 40=180\) beats per minute (BPM). Then, 60% of 180 is \(0.6\times180 = 108\) BPM and 70% of 180 is \(0.7\times180 = 126\) BPM. This range (60% - 70%) is optimal for fat oxidation and improving aerobic capacity. Option A (70% - 80%) is more for cardiovascular endurance and less focused on fat loss. Option B (50% - 60%) is a very low - intensity range, more for recovery or very beginner - level exercise. Option D (80% - 90%) is a high - intensity range, more for anaerobic training or improving maximum performance, not fat loss.

Answer:

C. 60% - 70%