If you are 13 years old, which math problem would give you your maximum heart rate? Response areaIf you are 13 years old, what is your maximum heart rate?Response areaAfter finding your maximum heart rate, remember your target heart rate zone is 70-85% of you maximum heart rate.What would be the lower range or your target heart zone? Response area   What would be the upper limit? Response area220 - 13200 + 13220 + 13145100176207200 - 13193

If you are 13 years old, your maximum heart rate would be around 207 beats per minute (220 - age).

The lower range of your target heart rate zone would be 145.5 beats per minute (70% of 207) and the upper limit would be 176 beats per minute (85% of 207).