Not being able to walk up a flight of stairs after squats, or not being able to put a drink to my mouth w/o my bicep cramping after working arms, not being able to sit-up w/o my abs cramping after abdominal work...
These are the times when that little voice in the back of your mind is saying... "yeah mofo! That's right!"...It's when you feel a certain "pain", but this pain is one that causes you to smile and sometimes laugh strangely instead of grimacing (or laugh BECAUSE you can't help but to grimace)