It's been several years since I was on mids and at that time, the department was still on the 4/2 schedule, we've gone to a pitman hybrid since then.
I would come home and try to go right to bed in the morning and sleep until early afternoon. I'd get up to spend some time with the kids and then get an hour nap before going back in.
On days off, I'd often try to sleep like normal people so I could do other family things and get errands done. On the 4/2 I was always cranky and tired. I am very familiar with that foggy, lowgrade headache feeling. As another wrote, the bowels seemed to run on their own clock and always kept things interesting.