I'm sure that excuses are not welcome here, but I would like to explain the reason I can't get to the gym today, and what I'll be doing instead
All my gym clothes are dirty

and I won't be able to do laundry today because I work 11-7:30. So...I'm going to try to get in LOTS of exercise at work (I'm a grocery store cashier). I'm not going to lean against my checkout stand, and I'll incorporate as much fidgeting/moving around as possible into my day.
I guess you could say that my exercise for the day is going to be 8 hours of slinging groceries