There is two things that I've got to work out and that is to find a appropriate height stool and a thick rubber mat. The constant standing will work on the legs and the back. I wore tennis shoes on concrete... that seemed to be better than my work boots.
The buffing action builds up static electricity and it has to discharge somewhere... most of the time it would discharge between my knuckle and the bench grinder housing. It doesn't really hurt but the shock scares me and I jump. I thought maybe a thick rubber mat would keep me from grounding. I hate wearing gloves so that's why I don't insulate my hands like that.
