vacation sickness

If you tend to get sick on vacation, what does that mean?

I remember hearing that is common, where you have to stop working in order to give your body time to get sick.

Except, I haven't done hardly any relaxing on this trip so far. In fact, this morning I was doing manual labor. Just gardening, but still harder on the body than programming.

I haven't ruled out that it's my body conspiring to prevent me from going to Bourbon Street tonight out of some misplaced obligation to party down.