Question

Calculate the Target Heart Rate for a 15 year old.

(220-age) x .5
(220-age) x .85

Choose the correct answer.

(5 points)
Responses

The Target Heart Rate for a 15 year old is 103 to 174
The Target Heart Rate for a 15 year old is 103 to 174

The Target Heart Rate for a 15 year old is 75 to 185
The Target Heart Rate for a 15 year old is 75 to 185

Answer 1

To calculate the Target Heart Rate for a 15-year-old, we can use the given formulas:

1. Calculate the maximum heart rate:
\[
\text{Max Heart Rate} = 220 - \text{age} = 220 - 15 = 205
\]

2. Calculate the lower end of the Target Heart Rate (50%):
\[
\text{Lower end} = 205 \times 0.5 = 102.5 \text{ bpm}
\]

3. Calculate the upper end of the Target Heart Rate (85%):
\[
\text{Upper end} = 205 \times 0.85 = 174.25 \text{ bpm}
\]

Now, rounding these numbers:

- Lower end: ~ 103 bpm
- Upper end: ~ 174 bpm

Thus, the Target Heart Rate for a 15-year-old is approximately 103 to 174 bpm.

The correct answer is: **The Target Heart Rate for a 15 year old is 103 to 174.**