Two people 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 displays the pulse rates of these two people before, while and after the exercise period. Which statement about 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.