Which of maslow’s needs is the most basic?

Physiological is the most basic level of Maslow's hierarchy of needs. This includes food, water and sleep. It also includes sex, breathing and homeostasis.

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)