text: wht is the right position for sitting long time when on work, precautions to avoid piles(heomeoheriods)?   just make sure you have a comfortable chair with plenty of cushioning. as a cna we change patients positions frequently to keep them from getting ulcers. so get up frequently to walk around and stretch, maybe do some yoga on breaks, and make sure you walk around alot. like walk to a co-workers desk to ask the work question instead of calling them. make sure your back and butt are well supported and don't wear clothes that are too constricting. good luck.