you can use an exercise ball part of the day, I'm 6'1" and use a 75cm one . . . you can pick one up at Target. Ikea has some decent chairs, go in and test them

you can use an exercise ball part of the day, I'm 6'1" and use a 75cm one . . . you can pick one up at Target. Ikea has some decent chairs, go in and test them out. The one I liked best was one of their least expensive ones.