So the air is crappy and I was feeling crappier

But I got on the treadmill and had the airiest easiest jog in a long while.  I was suspended in another dimension for an hour, with thin tethers to a quiet piston-like hip flexor action, the soft hum of a well-tended engine pulling my weightless limbs and core along.  Does this make sense?  Where the heck did I go?  My body fled discomfort entirely.