Answer:
His resting heart rate might decrease to 60 bpm
Explanation:
The average resting heart rate range is 60 bpm - 100 bpm. When people are healthier they tend to have lower resting heart rates. Many athletes have a resting heart rate of 60 bpm.
Training for a 10k race would make Charlie's heart work more during training, thus it doesn't beat as often during rest.
Those two are the muscular system and the excretory system because you use your muscles to push up and down and your excretory system produces the sweat you use while doing them
I NEED THE STATEMENTS PLSS
The answer is How you think about exercise. Hope I could help! ^w^
immobilization is the most important first aid care for a suspected fracture.
God bless!