a patient has noticed that his ability to hear has recently decreased. which item is not likely to have caused his problem?

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)

Stimulants speed up the central nervous system.