Hemophilia is characterized by. O inadequate production of blood clotting factors
O excessive production of fibrinogen
O excessive production of platelets
O inadequate production of heparin

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)