Sara is a 23 year old female. She is new to working out and would like to calculate her Target Heart Rate so that she knows if she is getting the most benefit from her exercise. When she took her pulse for 15 seconds she got 20 beats.

Calculate her Target Heart Rate (following all steps) for 50% and 80% intensity.

Question 14 options:

110-164

178.5-237.5

138.5-173.6

58.5-93.6

Target Heart Rate- this refers to the number of heart beats that you need to achieve in order to know your level of training intensity, which will satisfy your cardiovascular fitness goal.

1. In order to get Sara's "Target Heart Rate," we have to calculate her "Maximum Heart Rate." You can do this by subtracting Sara's age from 220.

220 - 23 (Sara's age) = 197 [tex]\frac{beats}{minute}[/tex](this is Sara's maximum heart rate)

2. Then, we have to get Sara's "Resting Heart Rate." This refers to the number of heartbeats she has per minute.

If she gets 20 heartbeats in 15 seconds, then this means she has 80 heartbeats per minute (this is Sara's resting heart rate).
You just have to multiple 20 heartbeats by 4.

3. Next, we have to get her "Heart-Rate Reserve." We can do this by subtracting the resting heart rate from the maximum heart rate.

197 [tex]\frac{beats}{minute}[/tex] - 80 [tex]\frac{beats}{minute}[/tex] = 117 [tex]\frac{beats}{minute}[/tex] (this is Sara's heart-rate reserve)

4. Now, we get the target heart rate or the aerobic training heart rate range so Sara can burn fats. We have to consider the 50% to 80% intensity.

50% of 100 [tex]\frac{beats}{minute}[/tex] = 50
80% of 100 [tex]\frac{beats}{minute}[/tex] = 80

Add the heart-rate reserve to both numbers, 50 and 80.
50 + 117 = 167; 80 + 117 = 197
the closest to these values is the option, 178.5 to 237.5, so this is the answer.