Are you happy ? Do you think that you're okay ? Is there someone who is stopping you from being happy or doing what you love? Is there a message you wanted to send to somebody but never got the chance? Be honest, and answer with your heart.

Cis the most source of vitamins

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)