Will I lose weight if I eat and exercise this way??

My stats: 15 year old girl, 5'3, and 129 pounds. I'm moderately active, so I need to eat 2,110 calories a day just to maintain my weight.

However, I'm looking to lose a pound a week. I'm cutting that 2,110 calories so that I eat 250 less than that per day. (1,860 calories per day.)

If I eat 1,860 calories per day, along with running 30-45 minutes 5 days a week and strength training, will I lose a pound a week?

I figured that if I eat 250 less calories, the exercising will also burn 250 calories, resulting in a 500 calorie deficit per day and a pound lost per week. But I don't know if that's correct or not, since the 2,110 calories is to maintain the weight with exercise, will cutting down by 250 calories only result in a 250 calorie per day deficit?

I'm confused........ any help please?

If the 2110 is to maintain wÍth exercise then your deficit would be the amount of calories that you cut from your diet or any additional exercise that isn't accounted for. So from your example your deficit would be 250 if that's how much you burn but working out for 30-45 minutes is probably burning about 300-400 calories and you're weight lifting so I'd say that 1700 would be more likely to yield a 1 pound loss, however anything lower would probably leave you hungry and discouraged. Stick to 1700-1800 and monitor your weight for a few weeks before making any changes.

youre at a healthy weight, how much do u want to lose??

eat well, be active, thats all

I agree with agruskin, I'm 2" shorter than you and that's about what I weigh.  Maybe you could cut 2lb-5lbs if you really feel the need but, that's a healthy weight, why do you want to lose?

I want a better body. I've got alot of muscle due to the sports I play, but they have a layer of flab covering them. My thighs, butt, and arms are sort of flabby (most butt!) and while my tummy is flat, I can definitely pinch an inch.

Your butt is supposed to have fat on it, so's your stomach.  They're called curves, and they're made of fatty tissue, just like your breasts.  You develop them during your teenage years.  They will probably get bigger as you get closer to and enter your twenties.  It's normal, healthy, and cannot be avoided without jeopardizing your health.  Your skin will have a layer of fat beneath it until you die, because you're female, do what it with you will.  Japanese pearl divers are almost exclusively women just for that reason, it's not a bad thing.

If you have muscle, you won't healthily be in the lower BMI range.  In fact, if you have a lot of muscle (like a lot of triathletes and such do), you might even be above the range statistically deemed "ideal".

Most people already in a healthy weight range are advised to lose .5-1lbs per week, at the most, if they need to lose at all.  This would be a calorie deficit of 500kcal/day.  If you are running and strength training regularly, you're somewhere between moderate and very active activity level: burning between 2,420 and 2,940kcal/day.  If you absolutely must, cut back to ~2,300 for a few weeks, see what happens.

I sincerely hope you educate yourself and develop good habits.  Talk to your doctor.  Read studies, not magazine articles or websites.  If you're going to do this, do it right-- if you don't wanna do it the long way, just live your life and think about dieting later, when your body has had time to level out.

Remember that CC's tools are not accurate for anyone under 21.  Here are links that might help you.

link - The long-term effects of under eating in your teens.

link - Kids/teens BMI and calorie expenditure calculator.

link - Guidelines for youth nutrition.

link - The Calorie-Count.com "Diet"