Mr. a presents to your office complaining of chest pain, mid-sternal and radiating to his back. he was mowing his lawn. he reports the pain lasting for about 8 minutes and went away after sitting down. what is his most likely diagnosis based on his presenting symptoms?

He is likely suffering from angina. Chest pain that occurs during exertion but is made better by rest.

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)