This classmate will show they are more open and subject to pressure and they will be lead on to do more and more by the people that see them as a “party animal” and they then will be with this group that peer pressure them into doing more and more dangerous things and if we’re talking about a real scenario they can get sick
Explanation:
How Age and Exercise Affect Your Max Heart Rate. The relationship between the heart and exercise has been studied for more than six decades and the research is clear: Max heart rate—the highest heart rate you can safely hit during exercise—decreases with age regardless of lifestyle or level of fitness.
I'm pretty sure it is physical and mental development
