Answer:
D it increases the blood flow throughout the body.
Explanation:
Um no the higher is better endurance and preformability... if that makes sense
I think Greg needs to start small than go bigger on the excersise .
He shouldn't rush on the process and he should be careful.Take everything slow.
He should work hard but not to the point where he gets hurt again or more.
Remind him to stretch before he does
Excersising.
He should run shorter distances and than later increase the number of miles or laps he is running .
I hope I helped I am not really a athletic person though
what exactly are you asking here that seems to be a statment
Answer:

Explanation:
Total distance of one lap of the marathon = 42.2 km
Distance of the lap that is inside the stadium = 400 m
The distance that is run outside the stadium is the difference between the two distances

The distance that is run on the road outside is
..