Counselors give people feedback about? their behavior, body language, facial expressions.
the details of their family history.
the appropriateness of their goals.
their ability to summarize and paraphrase.

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)