Just happened to read your reply as I was browsing something I really needed to look at today! Glad you put the reference up. Helped me undersstand more about calorie intake and outtake. Thank you and God bless!
No, the opposite is true. As you get older, your calorie needs decrease as your body gets more efficient. Teenagers require MORE calories. And if she's not finished developing, I would imagine that she would need more calories for that as well.
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If you eat less that what is recommended for your height and weight to reach your goal weight, your body goes into a "starvation/survival mode which reduces your metabolism. That is not a healthy way to lose weight and keep it off. I am 5'3" and my range was between 1290 - 1500. I also do cardio and strength training. It has never been a "diet", I never felt deprived or starved. It has been a life style change that I can live with for the rest of my life. I have lost 41 pounds to reach my goal weight. It may have taken me 8 months, but I have kept it off 2 years. I went from a size 10 - 12 to a size 4 - 6.
So Aliza my little sister has got to where she is tracking EVERYTHING she eats on a different website is 15 and like 5'3-5'4 and the site is telling her to eat 958 calories a day and she is not active at all so I can understand that this sounds correct. Is this healthy for her? will it help her lose weight? and she has also started going below it (like today she only had like 500 or 650 calories but she slept all day)