This is probably something a dietician would have to advise you on.
My understanding is that you would have to eat a caloric surplus to gain muscle. That muscle will in turn boost your metabolism and will help you burn fat.
Fitness Minutes: (20,330)
216 11/7/13 6:58 P
I have never weighed as less as I do right now and as I am close to reaching my weight goal. However, that might not be possible because I am also trying to gain lean muscle to become trim and fit. Most of my life I have been obese and now I am pretty active. Every day I stretch for about 10 minutes, I lift weights for a half hour, and I bike ride or swim for an hour. Now what I'm about to say I know is wrong, but I need to give some background history.
I ended up having to go see a Dietician because three months ago I was doing all this while only eating 1,000 calories a day. She suggested that I have at least 1,800 calories and maybe even 2,100 calories. So I slowly worked my way up to (currently) 1,800 calories. I feel that from eating 1,000 calories I did some damage to my body though. My stomach doesn't growl when I'm hungry, and I tend to binge at night.
The point I am trying to get to here...is how much do you think I should be eating to gain nothing but muscle and shape my body? As far as foods that I consume, I eat a lot of rolled oats, non-fat yogurt, lean meats, legumes, and milk - pretty much high protein-base. Here is an idea of what I looked like before and after. Currently I look a little more lean than I did in the second picture.