Here are some reasons I don't go to the gym:
I have been at work from 9 AM until 7:30 PM. I have put out 4 - 5 metaphorical fires, run up and down the stairs and drank three bottles of water to keep from passing out.
Its the one night of the week when I don't have rehearsals/a social engagement/late meetings/a work crisis and I just want to go home and sit on my couch for once in my life.
I haven't eaten since noon, its 6:30. I am about to pass out from hunger. I have to make the choice between going to the gym with a disturbingly growly stomach or eating dinner as soon as possible (guess which one always wins?!)
I have to start laundry (like, out of underwear, need to start laundry) and if I don't go home and do it now - it won't be done until like 2 or 3 in the morning because our dryer sucks.
I went to the gym yesterday and my legs feel all wobbly and weird.
...while I understand that these are all excuses, they seem so legit in my mind. So in 2012, I am going to figure out a way to make working out happen without all the excuses AND without going in the morning (fate worse than death).