A 45-yr-old woman with a resting heart rate of 65 beats per minute should keep her heart rate between 131 and 153 beats per minute while exercising. She checks her pulse for 10 sec while exercising. What should the number of beats
10 seconds = 1/6 of a minute.
So the number of heart beats in 10 seconds should be multiplied by the per-minute count by the same fraction.
For example, the lower limit is
131*(1/6) = 22 beats.
Can you complete the answer?
To determine the number of beats the woman should count in 10 seconds while exercising, we first need to calculate her target heart rate range.
The target heart rate range for exercise can be calculated using the formula:
Target Heart Rate = ((Maximum Heart Rate - Resting Heart Rate) x Exercise Intensity %) + Resting Heart Rate
Maximum Heart Rate can be estimated by subtracting the person's age from 220.
For a 45-year-old woman, her estimated maximum heart rate would be 220 - 45 = 175 beats per minute.
Using the given resting heart rate of 65 beats per minute and the target range of 131 to 153 beats per minute while exercising, we can calculate the exercise intensity as a percentage of the maximum heart rate.
To find the exercise intensity, we can use the formula:
Exercise Intensity % = (Target Heart Rate - Resting Heart Rate) / (Maximum Heart Rate - Resting Heart Rate)
Substituting the given values, we have:
Exercise Intensity % = (131 - 65) / (175 - 65) = 66 / 110 = 0.6 (or 60%)
Now, to find the number of beats she should count in 10 seconds, we need to convert her target heart rate from beats per minute (BPM) to beats in 10 seconds.
We can convert the target heart rate to beats per second by dividing it by 60:
Target Heart Rate (beats per second) = Target Heart Rate (beats per minute) / 60
Then, we can multiply the target heart rate (beats per second) by 10 to get the number of beats in 10 seconds:
Number of Beats = Target Heart Rate (beats per second) x 10
Substituting the given values, we have:
Number of Beats = (131 / 60) x 10 ≈ 21.83 (rounding to the nearest whole number would give us 22 beats in 10 seconds)
Therefore, the woman should count approximately 22 beats in 10 seconds while exercising to maintain her target heart rate range of 131 to 153 beats per minute.