Thomas, an engineer at a company in the US, was affected by sitting at his desk for up to eight hours a day. At the end of some workdays, he experiences stiffness in his back and joints. At times, his hips would split open. Standing at work has greatly improved his health, Thomas said. "I go back and forth between standing and sitting all day. I listen to my body. If I stand for an hour and my feet hurt, I go back to sitting." During a typical work day, Thomas reckons he may be...