Report on my first attempt at swimming in two years:

Took the bus. Looked uber cool.
Entered the leisure centre. Was uber nice.
Went to the changing room. Didn't have money for a locker. Was uber pragmatic (just dashed my stuff in a locker and left it open B|)
Went for a swim. Was uber unfit B|
Got out. Had jelly legs and a headache - did some super cool meditation.
Waited for my legs and head to fix up. My stomach joined them.
Called it a day.
My stomach did too. In a bin that stunk of banana.
Got home and died on the sofa for a few hours (in an uber cool totally not tired or anything way B|)