I previously used LoseIt! but have switched to MyFitnessPal. The only thing I dont like about MFP is that the highest amount of weight you can lose on their plan is 2lbs a week, so its actually telling me I need almost twice the calories that the doctors have me on. I like MFP so much better though, mostly because we can find a recipe online, copy and paste it into the app and it'll calculate the nutritional information for you. The psychologist mentioned that another trait of skinnier people is that they keep track and know exactly what and how much is put into their body every day. Once I lose the weight, I'll probably keep entering the foods.
The first week or so, its mostly getting rid of water weight bloat. Even so, I was able to notice a difference in the way my clothes fit. I used to have slight pitting edema in my shins, and its now gone. My quads and calves have magically reappeared in all their muscular glory, and my stomach has already shrunk about 4 inches.
They have you start out doing zero exercise the first week to let your body adjust to the diet. The second week they have you start doing 10 minutes of cardio, 5x a week, which is as simple as walking. They build you up to 30 min, 5x a day. Starting on Monday I'm going to do P90X3 again, which is 30 minutes. I have a very athletic frame underneath the fat, so my biggest concern is losing muscle with this diet. Between the P90X3 and the personal trainer sessions, I'm hoping to retain what I've got for the most part.
