What is the inherited disorder in which muscular fibers are progressively
destroyed.

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)

Your doctor will speak with you regarding your concern for all the the above he / she will maintain regular checkups with you regarding the yes answers you answered in the questionnaire

1. a lack of knowledge

1.   accept set-backs2. correct intensity  level3. feedback4. progress  incrementally5. lifelong process6. goal making