Anorexia Nervosa : Risk Factors

Adolescence is naturally a time of change, and change can cause stress. But it is also an exciting time for kids and parents to get to know and interact with each other in new and different ways.

Detailed information on adolescence, ages 13 to 18 years

Detailed information on child growth and development at 13-18 years

Detailed information on child growth and development at 13-18 years

New neuroscientific research shows the adolescent brain undergoes changes before maturing completely, perhaps explaining some behavior during teenage years.

The term overweight is used to describe an excess amount of total body weight including all tissues (fat, bone, muscle, etc.) and water. Obesity , in contrast, is an excess amount of body fat. An adult woman or man who has a body-fat percentage exceeding 35 percent (for women) or 25 percent (for men) is considered obese . A person can be overweight without being obese, as many professional football players and bodybuilders are, for such individuals have large amounts of muscle but not much fat. Likewise, a person can be obese without being overweight, such as some elderly individuals or lazy "couch potatoes," who may not weigh a lot but have too much body fat. However, almost all obese people are also overweight. Because body fat is very difficult to measure accurately, height and weight are used to estimate overweight and obesity. Body mass index (BMI) is a formula that combines both height and weight. It is computed as weight in kilograms divided by height in meters squared, or as weight in pounds times 703 divided by height in inches squared. Normal weight for adults is represented by a BMI of 18.5 to 24.9; overweight by a BMI of 25 to 29.9; and obesity by a BMI of 30 or greater. SEE ALSO O BESITY ; W EIGHT L OSS D IETS ; W EIGHT M ANAGEMENT . John P. Foreyt

Unintentional weight gain is an increase in body weight that occurs when a person takes in more calories than the body needs or uses.

Whether you’ve already gained a few extra pounds or have yet to reach perimenopause, here are strategies to help you maintain a healthy weight in midlife and beyond.

When weight gain occurs suddenly or can't be explained by your eating and exercise habits, it's worth taking a closer look.

Between the late 30s and late 40s, it's not uncommon for both men and women to gain 10 pounds.

In experiments on mice, suppressing a chemical linked to stress and appetite prevented the formation of abdominal fat cells, which could lead to new possibilities for weight loss drugs.

A Harvard Medical School physician discusses how to avoid holiday weight gain.

Most people who gain weight are taking in more calories per day than they are using. If you are gaining weight despite eating fewer calories and maintaining your usual amount of physical activity, this guide is for you.

The most common prescription medications to cause weight gain include drugs that treat depression, heartburn, bipolar disorder, high blood pressure, and diabetes.

Does insulin cause weight gain? I started taking insulin in July and gained 15 to 20 pounds in three months.