[stevepotter]

I built something similar a few years back. Walking at a snail's pace for a few hours a day was nice for bloodflow and focus. Then I started getting major headaches. I went to the doctor and couldn't figure out what was wrong.

Then I realized that my head bobbing up and down while staring at my screen was causing it. Stopped using the desk and it went away. I raised my screen to eye level and that helped. But the headaches still occurred so I reluctantly quit. Maybe I walk funny or I'm sensitive to it, but I'd like to warn anyone doing this to make sure you don't make yourself sick. Beyond that, have fun and good luck explaining it to others :)