Charlie has been training for a 10k race. He checks his resting heart rate every morning and discovered he has an average resting heart rate. What change might Charlie see as he continues training? A.
His resting heart rate might decrease to 100 bpm
B.
His resting heart rate might increase to 100 bpm
C.
His resting heart rate might decrease to 60 bpm
D.
His resting heart rate might increase to 60 bpm