If you are 13years old, which math problem would give you your maximum heart rate?

After finding your maximum heart rate, remember your target heart rate zone is 70-85% of you maximum heart rate, what would be your lower range or your target heart zone?

What would be your upper limit?Response area

The math problem that would give you your maximum heart rate would be:

Maximum Heart Rate = 220 - age
Maximum Heart Rate = 220 - 13
Maximum Heart Rate = 207 beats per minute

To find your target heart rate zone, you would take 70-85% of your maximum heart rate:

Lower range: 207 * 0.70 = 144.9 beats per minute (rounded to 145 beats per minute)
Upper range: 207 * 0.85 = 175.95 beats per minute (rounded to 176 beats per minute)

So, your target heart rate zone would be between 145 and 176 beats per minute.