Two individuals completed a brief session of exercise on a treadmill. Both people ran on the treadmill for the same length of time and at the same speed. The graph illustrates the pulse rates of these two individuals before, during and after the exercise period. Which interpretation of the graph is correct?
- APerson X is fitter, and their heart rate increases more during exercise.
- BPerson X is fitter, and their heart rate recovers more quickly after exercise.
- CPerson Y is fitter, and their heart rate increases more during exercise.
- DPerson Y is fitter, and their heart rate recovers more quickly after exercise.