I used to do drywalling and we'd stand on sawhorses, have the board on our heads, and push up with the legs to 'suspend' the ceiling boards there while we would nail in the perimeter nails. The bounce of the rafters gave me a hell of a headache each day. I managed to make it even worse by wearing a ball cap...one of the ones with that little metal button on top. THAT hurt worse of all!
Now I've got a lot less up top and so there's no cushioning. Thankfully I'm a white collar worker now...no headaches. Mind you I'm sitting on my ass for hours on end and while drywalling wasn't good for the head it was good for the body...get your exercise on a daily basis without really trying.
Someday I hope to have a detached house (and not a condo/townhouse/apartment) with enough room for a studio/garage....someday.