Maintaining a healthy weight helps you protect your health and prevent disease.

metabolism body mass index (BMI) overweight obese underweight

The Calorie Connection You maintain your weight by taking in as many calories as you use. Calories are units used to measure the energy found in food.

The Calorie Connection If you consume more calories than your body needs, you will gain weight. If you use more calories than you take in, you will lose weight.

Your Energy Balance Energy balance is the balance between the calories you take in the calories you burn

Your Energy Balance Your metabolism converts the food you eat into fuel. Metabolism The process by which the body breaks down substances and gets energy from food

Your Energy Balance It takes about 3,500 calories to equal 1 pound of body fat. Thus, if you consume 500 fewer calories than you use every day, you will lose 1 pound per week.

How Many Calories? High-fat foods are high in calories. Some low-fat foods may also be high in calories. Food preparation also plays a role in how many calories a food delivers.

How Many Calories?

Maintaining a Healthy Weight Body mass index and body composition help you judge whether your weight is healthy. The right weight for each person is based on age, gender, height, body frame, and stage and rate of growth.

Body Mass Index To learn if your body weight falls into a healthy range, calculate your body mass index (BMI). Body mass index (BMI) A measure of body weight relative to height

Body Mass Index Your BMI can help you to determine if you’re overweight or at risk for being overweight. Overweight Heavier than the standard weight range for your height

Body Composition Your body composition is the ratio of fat to lean tissue in your body.

Body Composition Every teen grows at his or her own rate. Some of your friends will be taller or shorter than you, and some will weigh more or less than you.

Your Weight and Your Health Being either overweight or underweight carries health risks. People whose weight does not fall into a healthy range are at a higher risk for various diseases.

Your Weight and Your Health Staying active helps you maintain a healthy weight.

Weighing Too Much Teens who are overweight may be at risk of becoming obese. Obese Having an excess of body fat

Weighing Too Much Health Problems Associated with Being Overweight Hypertension Cardiovascular disease Type 2 diabetes Osteoarthritis Gallbladder disease Asthma and other respiratory problems Certain types of cancer

Weighing Too Little Teens who are underweight may feel weak, tire easily, or have trouble concentrating. Underweight Below the standard weight range for your height

Weighing Too Little For some teens, being too thin can mean that they are not getting the calories and nutrients their growing bodies need. They also may be exercising excessively to burn calories.

Managing Your Weight Stay physically active and eat healthful foods. Teens should eat a healthful, well-balanced diet every day to reach a healthy weight.

Managing Your Weight Target a healthy weight. Set realistic goals. Personalize your plan. Put your goals and plan in writing. Evaluate your progress. Learn your ideal weight range. Eat healthfully and exercise regularly. Eat foods you enjoy. Write down your goals and your plan. Track your weight on a weekly basis.

Healthful Ways to Lose Weight Eat fewer foods that are high in fats and added sugars. Watch portion sizes. Choose nutrient-dense foods. Healthful Ways to Lose Weight Be active. Enjoy your favorite foods in moderation. Stay hydrated. Tone your muscles.

Healthful Ways to Lose Weight Eat nutritious snacks. Choose higher-calorie, nutrient-rich foods. Select foods from the five major food groups that are higher in calories. Healthful Ways to Gain Weight Get regular physical activity.

Physical Activity and Weight Management This graph shows how many calories a person weighing 125 to 175 pounds can burn doing each activity for 10 minutes.

Physical Activity and Weight Management What Can Physical Activity Do for You? It helps relieve stress. It promotes a normal appetite response. It increases self- esteem, which helps you keep your plan on track. It helps you feel more energetic.

After You Read Reviewing Facts and Vocabulary Metabolism is the process by which the body breaks down substances and gets energy from food. 1.What is metabolism?

After You Read Reviewing Facts and Vocabulary 2.Explain how to calculate your body mass index. Divide your weight in pounds by your height in inches. Divide that result by your height again, and multiply the result by 703.

After You Read Reviewing Facts and Vocabulary 3.List three health problems associated with being overweight and obese. Any three: hypertension, cardiovascular disease, type 2 diabetes, osteoarthritis, gallbladder disease, asthma and other respiratory problems, certain types of cancer