What do you mean by Healy

A person who raids co-worker's items in the fridge and often takes food home. ty pically they enjoy tram spotting on the way home. You are such a healy

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)