I'm 5'2" with a medium frame. I am maintaining 110lbs (give or take a few lbs; my weekends can get a little lax!). I can eat more calories without gaining as long as that increase is in fats. Either my metalobolism jumps just a bit or I get hyper and restless and have to start moving. If you feel like maybe you need to take in more calories then just do things like add butter to veggies or eggs or even on top of a steak. Throw some cheese (if you can tolerate it) on top of veggies. Coconut oil is great stuff (so is coconut milk). I'm not a big daytime eater so I have a tendency to keep full fat cans of coconut milk on hand to ensure I am getting enough calories. Add some Now Sports Unflavored Whey Protein and I'm set for the day and can enjoy a nice big dinner. (I can even add some coconut sugar to it for a little sweetness).

You get more nutrition with a Paleo/Primal diet. That makes a big difference. Nutritional intake is a big marker of satiation. You get enough nutrition with your meal and you don't need to eat as many calories - they're a source of energy ONLY and your body will store and take energy as needed. (it takes 4 bowls of oatmeal to get the protein in 4oz of meat). Don't eat when you're not hungry. And if you have gotten good at listening to your body then you don't need to listen to anyone else.

I have found that as long as my carbs stay consistent (protein always between .7-1.0g per lb of LBM) my fat intake can go up and down without the scale following. Instead, my energy level goes up and down. If my carbs go up and stay up then the scale follows either with water gain or fat/water gain depending on the type of carb and the amount of fat I'm eating with those carbs.

Also, I've been wearing a BodyMediaFit Armband for the last year and a half. I see my average calorie burn - it's a pretty accurate estimate and can jump all over the place (I've seen a 900 calorie difference between 2 consecutive days). I don't eat 2000 calories. In fact, what I burn and how many calories I eat seem to have no relation to each other. It's what I put in my mouth.

I'm no doctor or anything like that ... but I figure that if you feel good, you are fine. Do what is working for you. Your body should tell you if you are not eating enough.

Years ago I used to jog a lot, training for marathons, etc. I belonged to a great group. One day I posted how tired I was feeling a lot of the time and someone suggested I eat more. I followed his advice and it worked.

Bottom line, as long as there are no significant metabolic conditions going on with you ... listen to your body.

We are all unique and there simply is NO one-size-fits-all for diet and exercise (other than the biologic physics behind the concept that to lose weight, one must consume less than what one burns).

I'm also struggling with this.

I haven't tracked my food ever before. This week I started Paleo. I'm having a REALLY hard time even getting to 1200 calories - I feel completely full by 5pm and it seems ridiculous to force my self to eat so much more food if I'm not hungry.

The research and forums suggest adding in a couple handfuls of nuts [good fat], fruit [good carbs], veggies [good everything] throughout the day to up the numbers, but it's hard!

It just feels odd I guess to complain 'what do you mean I'm supposed to eat MORE if I want to lose weight?!'.