To find a​ person's target heart rate in beats per​ minute, follow this procedure. Subtract the​ person's age from​ 220, then multiply this difference by 60​% and 75​%. The difference

Question

multiplied by 60​% gives the lower limit and the difference multiplied by 75​% gives the upper limit.
Find the target heart rate range of a 43​-year-old.

Answer 1

To find the target heart rate range for a 43-year-old, follow these steps:

1. Subtract the person's age from 220: \[ 220 - 43 = 177 \]

2. Calculate the lower limit (60% of the difference): \[ 177 \times 0.60 = 106.2 \]

3. Calculate the upper limit (75% of the difference): \[ 177 \times 0.75 = 132.75 \]

4. Round the results to whole numbers (since heart rate is typically measured in whole beats per minute):

   • Lower Limit: 106.2 rounds to 106
   • Upper Limit: 132.75 rounds to 133

Target Heart Rate Range for a 43-year-old:

• Lower Limit: 106 beats per minute
• Upper Limit: 133 beats per minute

Thus, the target heart rate range for a 43-year-old is 106 to 133 beats per minute.