Hi just wanted to add my routine in the mix. I walk from 30minutes to an hour and 15 minutes aday. Now when i say walk thats not what i really do, i try to walk fast enough so that im not quite jogging I also try to concentrate on deep breathing and a very large stride so far that has helped me the most. I think I haven't missed aday since i started atkins about a month ago. Also I do alittle weight training about 3 times aweek for a constant 30 minutes. So far Im losing weight at a good rate and i feel very good. I also drink about 3-4litres of water aday and take supplements.
Good Luck!