What is alateen’s target audience?
teens who are alcoholics
teens whose family members are alcoholics
adults who were alcoholics as teens
teen parents who are alcoholics

Teens whos family members were alcoholics or addicts

The person who utilize the progression principle will keep adding the difficulty of the exercise that he's doing, while the person who does not, will only stay stagnant.  the person that utilize progression principle, will get a stronger endurance because now his body is conditioned to do harsher routines.{the answer was already on verified)