On a normal food diet, I could do anywhere up to 6 miles on the treadmill, a 30-45 minute session on the punch bag, 15 minutes no the speed ball and 45-1hr dog walk each day. But on exante I have no energy to do that. Exercise bike should be here soon so that will help, I'll do 5-10 mile per day on it as well as the other stuff.
It can have a very big effect on the weight loss, some may lose more without the exericse, everyone is different, but it DOES help.
Just start off light, and gradually add more time on what you do, set mile stones.
If you can it's best doing exercise on a morning, as after you finish your body will continue to burn carbs and calories (I know there's no carbs on exante).