The frontal lobe is the last part of the brain to develop; this typically occurs when an individual is 20 years old or older. How might this fact affect the actions and behaviors of those not yet in their 20s?

Because the prefrontal cortex is still developing, teenagers might rely on a part of the brain called the amygdala to make decisions and solve problems more than adults do. The amygdala is associated with emotions, impulses, aggression and instinctive behavior.

Explanation:

well say a good goal is to do 150 sit ups in a week! or 90 pull ups a day. even 60 push ups in a month these are all fair goals!