If you are 12 years old, which math problem would give you your maximum heart rate? 220-12 After finding your maximum heart rate, remember your target heart rate zone is 70-85% of your maximum heart rate, What would be your lower range or your target heart zone? ___What would be your upper limit?_____
To find the maximum heart rate, use the formula 220 - age.
For a 12-year-old, the maximum heart rate would be 220 - 12 = 208 beats per minute.
To find the lower range of the target heart rate zone (70% of the maximum heart rate), multiply the maximum heart rate by 0.70.
Lower range = 208 * 0.70 = 145.6 beats per minute.
To find the upper limit of the target heart rate zone (85% of the maximum heart rate), multiply the maximum heart rate by 0.85.
Upper limit = 208 * 0.85 = 176.8 beats per minute.
Therefore, the lower range of the target heart rate zone for a 12-year-old would be approximately 146 beats per minute, and the upper limit would be approximately 177 beats per minute.