Well, my feet are becoming accustomed to the hardness of the hangar floor and my knees are getting used to the idea of climbing up and down in and out of airplanes. This is a slow process.
My neck and shoulders, however, are not yet adapted to all the looking up that I am doing, up into wheelwells, up at wings, up and engines, up, up, and more up.
I just invested in some ibuprofen. The large count liquid-gel kind.
Some years ago I traded a moped to a chiropractor for a Panasonic massage chair. That thing has become my best friend these last few weeks.