Earlier today Slashdot posted this question:

"Personally, I sit at a computer desk for 10 hours a day with very little actual work. I've also started to get a little belly and out of shape. I know it's real bad in my office, especially with all the beer I consume. What do you do to stay in shape? Any secrets? Recently I've started to do sit ups, push ups, and running up and down the stairs. I get a lot of odd looks, and would prefer something that doesn't make the whole office stare at me. I've looked through some websites with equipment, but it's all serious equipment I can't/won't lug into work. Any suggestions?"

It has generated some helpful comments. (There's a few crass jokes and cuss words mixed in with the good advice.)