Peer pressure. This is especially true with younger people; however, our peers can influence us to such a degree because we want to fit in and we don’t want to disappoint our friends.
Socializing.
Community.
Socioeconomic status.
Stress.
Marathon’s consist of running/jogging/sprinting long distances, so first off it would be a good idea to increase stamina, which would be done by jogging everyday, increasing your distance everyday. Stretch your calf muscles upper leg muscles to avoid cramps while running too.
CO2 from the blood is released from the blood cells into the alveoli for exhalation while O2 from the alveoli is received into the blood cells to deliver oxygen to other parts of the body
Answer:
I think it's all of them.
