If you'd like to lose some weight may I recommend that in addition to using your Treadmill Desk that you check out TheDailyPlate.
You enter your weight goal and then The Daily Plate computes what it will take for you to achieve your goal. The main feature is that it tracks what you eat every day. The site has a 175,000 food item database. Because of this extensive database, it's easy to enter what you ate.
The cost is also excellent: FREE!
If you're a geek like me, you'll have fun while losing weight.