Difference between ephysema and empyema

Emphysema is a condition gathering area between the lungs and chest, while emphyema is an infection of lung tissue.

Be by his side : ) make him feel better

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)