Jannah's heart rate reserve is 162 beats per minute. To calculate it, first find her maximum heart rate using the formula 220−age220-\text{age}220−age:
- Maximum Heart Rate = 220 - 17 = 203 bpm
Then subtract her resting heart rate (41 bpm) from the maximum heart rate:
- Heart Rate Reserve = 203 - 41 = 162 bpm
This means Jannah's heart rate reserve is 162 beats per minute.