Many kids are spending less time exercising and more time in front of the TV, computer, or video-game console. And today's busy families have fewer free moments to prepare nutritious, home-cooked meals. From fast food to electronics, quick and easy is the reality for many people.

Preventing kids from becoming overweight means adapting the way your family eats and exercises, and how you spend time together. Helping kids lead healthy lifestyles begins with parents who lead by example.

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Is Your Child Overweight?

Body mass index (BMI) uses height and weight measurements to estimate a person's body fat. But calculating BMI on your own can be complicated. An easier way is to use a BMI calculator.

Once your child's BMI is known, it can be plotted on a standard BMI chart. Kids ages 2 to 19 fall into one of four categories:

1. underweight: BMI below the 5th percentile
2. normal weight: BMI at the 5th and less than the 85th percentile
3. overweight: BMI at the 85th and below 95th percentiles
4. obese: BMI at or above 95th percentile

BMI calculations aren't used to estimate body fat in babies and young toddlers. For kids younger than 2, doctors use weight-for-length charts to determine how a baby’s weight compares with his or her length. Any child who falls at or above the 85th percentile may be considered overweight.

If you're worried that your child or teen may be overweight, make an appointment with your doctor, who can assess eating and activity habits and make suggestions on how to make positive changes. The doctor also may decide to screen for some of the medical conditions that can be associated with obesity.

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The Effects of Obesity

Obesity increases the risk for serious health conditions like type 2 diabetes, high blood pressure, and high cholesterol—all once considered exclusively adult diseases. Obese kids also may be prone to low self-esteem that stems from being teased, bullied, or rejected by peers.

Kids who are unhappy with their weight may be more likely than average-weight kids to:

• develop unhealthy dieting habits and eating disorders, such as anorexia nervosa and bulimia
• be more prone to depression
• be at risk for substance abuse

Overweight and obese kids are at risk for developing medical problems that affect their present and future health and quality of life.

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Causes of Overweight

A number of factors contribute to becoming overweight. Genetics, lifestyle habits, or a combination of both may be involved. In some instances, endocrine problems, genetic syndromes, and medications can be associated with excessive weight gain.

Much of what we eat is quick and easy—from fat-laden fast food to microwave and prepackaged meals. Daily schedules are so jam-packed that there's little time to prepare healthier meals or to squeeze in some exercise. Portion sizes, in the home and out, have grown greatly.

Plus, now more than ever life is sedentary—kids spend more time playing with electronic devices, from computers to handheld video game systems, than actively playing outside. Television is a major culprit.

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Preventing Overweight and Obesity

The key to keeping kids of all ages at a healthy weight is taking a whole-family approach. It's the "practice what you preach" mentality. Make healthy eating and exercise a family affair. Get your kids involved by letting them help you plan and prepare healthy meals, and take them along when you go grocery shopping so they can learn how to make good food choices.

And avoid falling into these common food/eating behavior traps:

• Don't reward kids for good behavior or try to stop bad behavior with sweets or treats. Come up with other solutions to modify their behavior.
• Don't maintain a clean-plate policy. Be aware of kids' hunger cues. Even babies who turn away from the bottle or breast send signals that they're full. If kids are satisfied, don't force them to continue eating. Reinforce the idea that they should only eat when they're hungry.
• Don't talk about "bad foods" or completely eliminate all sweets and favorite snacks from kids' diets. Kids may rebel and overeat these forbidden foods outside the home or sneak them in on their own.

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Recommendations by Age

Additional recommendations for kids of all ages:

• Birth to age 1: In addition to its many health benefits, breastfeeding may help prevent excessive weight gain. Though the exact mechanism is not known, breastfed babies may be more able to control their own intake and follow their own internal hunger cues.
• Ages 1 to 5: Start good habits early. Help shape food preferences by offering a variety of healthy foods. Encourage kids' natural tendency to be active and help them build on developing skills.
• Ages 6 to 12: Encourage kids to be physically active every day, whether through an organized sports team or a pick-up game of soccer during recess. Keep your kids active at home, too, through everyday activities like walking and playing in the yard. Let them be more involved in making good food choices, such as packing lunch.
• Ages 13 to 18: Teens like fast food, but try to steer them toward healthier choices like grilled chicken sandwiches, salads, and smaller sizes. Teach them how to prepare healthy meals and snacks at home. Encourage teens to be active every day.
• All ages: Cut down on TV, computer, and video game time and discourage eating while watching the tube. Serve a variety of healthy foods and eat meals together as often as possible. Encourage kids to have at least five servings of fruits and vegetables a day, limit sugar-sweetened beverages, and eat breakfast every day.

If you eat well, exercise regularly, and incorporate healthy habits into your family's daily life, you're modeling a healthy lifestyle for your kids that will last. Talk to them about the importance of eating well and being active, but make it a family affair that will become second nature for everyone.

Most of all let your kids know you love them — no matter what their weight — and that you want to help them be happy and healthy.

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