I was told just walking for the first 2 weeks but then after that I could do the treadmill, elliptical, and the bike. I started at 2 weeks 2 days and I go to the gym 5 days a week. My weight loss is very slow though. I am not sure what I can do to increase the weight loss. I have read others losing 20 to 40 pounds in the first month. I am going to try and increase my exercise and see if doing more than an hour a day makes a difference.