Why is this not working? Am I doing something wrong??

Hi, ok so I am 16 years old, and currently 145lb and 5'7. My goal weight is around 120lb, but I am more focused on looking really in shape, and well skinny!

My diet right now is 1400-1600 calories. I run every other day for 30min, and calestenics for another 30min. I also use my bike to get around. So I think I am exercising a lot! But I have seen no results. I have been at this for two weeks and nothing has changed. It is very discouraging, and I feel like no matter how hard I try nothing is going to change. :(

Please help! If I'm doing something wrong, tell me, or just general input. Thanks :)

You're not eating enough.

For reals.

Eat more and you'll see the results you desire.

It takes about two to three weeks to really see results. Just make sure you are eating a well balanced diet. Dieting to young can really be bad on the metabolism. You need fuel to burn fuel, try having smaller more frequent healthy well balanced meals, and don't eat a lot of chocolate. You can talk to your doctor to help set up your diet plan and what type of exercises you should do or stay away from.

I feel that 120 at 5'7 is pretty thin.  Don't be concerned so much with the number and just go for feel.  Also, it can take up to 4 months of consistant exercise to really see a loss in weight (as stated by my trainer).  Try some weight lifting too.  The more muscle you have, the more calories you burn.

 I agree with erin.  120 is really thin for someone who is 5'7".  Have you used the tools on this website to determine a goal weight.   I'm only 5'2" and the goal weight given me is 120.  Personally, I will be happy at 130, but I am 50 years old.  I know when I was 16 I weighed about 120.  Of course I thought I was overweight but when I look at the old pictures of myself, I was just fine.  Honestly.   You need to follow the guidelines of how much to eat after you use the tools.   You are exercising plenty.  Yes, a little bit of weight training would be useful to strengthen your upper body, but you have to realize that muscle weighs more than fat.  This means you could weigh 140 and be just perfect because you have lost the fat, but gained muscle.   Please note,  a woman should not be too lean.   I know men will work out and muscle up to get really low body fat percentages, below 10% and even below 5%.   A woman's body is designed to carry more fat.  It's not just to "have babies", however it is part of the complex set of hormones and cycles that a woman has.   You can do harm to your body in so many ways by getting too low a body fat.  Please read as much as you can on woman's nutrition.  An woman who is an athlete will often have so low of body fat that they do not cycle.  Although this will eventually rectify itself ( usually ), it is not necessary for the average woman. 

Getting in shape and developing good nutritional habits at a young age is a great thing to do!  Just learn as much as you can so that you know you are doing healthy things.