YOAD recommends 30 minutes of walking a day. I run on the treadmill, do the elliptical, stairmaster, or bike, at the gym 5 days a week. I burn 500 calories each time. Is this too much? Does YOAD provide enough calories a day that will prevent me from going in starvation mode? I want results! But I don't want to over-do it. Let me know what you think. Thanks.