To really beat that lethargic feeling at work, the Walkstation from Steelcase is an exercise desk that elegantly combines a treadmill with a workstation. These units are pretty pricey (starting around $4200), but you may find that an office could share the Walkstation as a “drop zone” used by several employees. If you are wondering if walking on a treadmill would still allow you to preform your daily work tasks, check out the results of this study which proved that participant’s performance did not drop, but did take a bit of getting used to.
Strengthen your core, and work against bad posture, simply by standing at your desk! The easily adjustable GeekDesk allows you to easily change the height for multiple users, or to switch between sitting and standing positions. The frame height has an amazing span, adjusting from 21.7″ at lowest all the way to 47.95″ high. It will also carry up to 275lbs on the top, so you could easily keep heavier items like books or monitor in place while adjusting the height.