You're being paid to stay in your chair and do your work. So it's easy to rationalize away those impulses to strip off your tie or throw off your high heels and run screaming down the sidewalk to the nearest park where you can roll around in the grass and sunshine and feel alive. Don't feel guilty about experiencing angst about being contained at the office like a caged animal. Wanting to escape is in your DNA, and doing so can make you more effective at work.