How do I drop 40 lbs?

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  BMI (Body Mass Index) is a measurement of body fat based on height and weight that applies to both men and women between the ages of 18 and 65 years.

You have a BMI of 30.1.

BMI is between 30-34.99 (Obese Class 1)

Individuals with a BMI of 30-34.99 are in a physically unhealthy condition, which puts them at risk for serious ilnesses such as heart disease, diabetes, high blood pressure, gall bladder disease, and some cancers. This holds especially true if you have a larger than recommended Waist Size. These persons would benefit greatly by modifying their lifestyle. Ideally, see your doctor and consider reducing your weight by 5-10 percent. Such a weight reduction will result in considerable health improvements.   bmi calculator:

http://www.bmi-calculator.net/

  I don’t have a weight chart for teen girls as tall as you so I am using the Adult chart.

Your weight should probably be between 126 and 154 pounds.   Normal Adult Height-Weight Range Table

http://www.recipehound.com/weight.html

You didn’t gain all your weight overnight, so don’t expect to lose it overnight. A slow steady pace of loss is healthier for you and will help you keep it off.   Info if you are trying to lose weight:

http://www.bmi-calculator.net/treatment/overweight-treatment.php

  “How can I Lose 1 pound of body weight per week?”   One pound of body fat is equal to about 3500 calories. So to lose 1 pound of weight per week, you need to eat 500 calories/day LESS than you burn.

But it’s not a good idea to lose weight simply by cutting calories. As well as decreasing calories you should increase your daily physical exercise. This helps to burn calories and build more lean tissue which in turn burns more calories.

“What should a minimum calorie intake be?”

As a guide to minimum calorie intake, the American College of Sports Medicine (ACSM) recommends that calorie levels never drop below 1200 calories per day for women or 1800 calories per day for men. Even these calorie levels are quite low.

http://www.bmi-calculator.net/bmr-calculator/harris-benedict-equation/calorie-intake-to-lose-weight.php