John is jogging on a winter day. The outdoors temperature is 31 degrees F. Yet, his body temperature is 98 degrees F. What term best describes the process causing this difference in temperature? A. homeostasis B. pathophysiology C. fever D. hyperthyroidism

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)