Walked 30 miles last week while working! I am writing my next book and couldn't stand sitting at my desk for 6 hours at a stretch. At the end of the day my neck and shoulders were killing me. The other thing killing me was the weight I was putting on from inactivity. I absolutely love my treadmill desk and only wish I knew about it a year ago. The biggest problem is that my husband and I fight over who gets to use it. I wish we had room for 2 of them. It's not pretty, but I don't care since it's in my exercise room. At our next party I plan on putting it in the living room with a black tablecloth. Perfect for a bar!