Dr Rob De Stefano, a chiropractor in private practice in New York City, recommends alternating back and forth between sitting and standing. "It is best to do 30 minutes of each for most people, but if one is used to sitting, increase the amount of sitting time to about 45 minutes and 30 minutes standing would be better," he told CBS News. "Yes, standing too much can become uncomfortable and irritate the hips or back if they have any prior injuries." He recommends purchasing a desktop that balances on an adjustable stand up office desk and moves up and down, rather than a stationary stand up desk. This way you won't feel like you're stuck constantly on your feet.