Overweight in Adults
(Obesity; Morbid Obesity)
Overweight is a body weight that is above an ideal range. Extra weight can increase in the risk of some serious health problems. This includes heart disease, certain cancers, and diabetes.
One tool used to check weight range is the body mass index (BMI). This scale creates weight ranges based on height. BMI levels in adults include:
- Ideal weight range: 18.5-24.9
- Overweight: 25-29.9
- Obese: 30 or above
- Morbid obesity: 40
Overweight is caused by taking in more calories than are used. Calories are taken in through food. Physical activity and basic body functions use calories. If more calories are eaten than used, then weight gain will happen.
Factors that can influence the development of obesity include:
- Genetics and family history
- Race, ethnicity, and culture
Factors that may increase your chance of becoming overweight include:
- Personal history of obesity as a child
- Family history of obesity
- Eating large portions of food
- Sedentary lifestyle—getting too little exercise and spending too much time in front of a television or computer
- Eating until full and eating quickly
High level of
- Working varied shifts
- Not getting enough sleep
- Medications, such as corticosteroids, antidepressants, or antipsychotics
Medical conditions such as
Symptoms may include:
- Increased weight
- Thickness around the midsection
- Obvious areas of fat deposits
Complications of Excessive Weight Gain
An increased risk of:
Decrease in quality of life associated with:
Being overweight can also affect pregnancy. Some complications include:
You will be asked about your symptoms and health history. A physical exam will be done. Obesity is diagnosed by visual exam and body measurements using:
- Height and weight tables
- Body mass index
- Measuring body folds with a caliper
- Measuring waist circumference
- Water-displacement tests
Obesity is difficult to treat. Things that affect treatment are:
- Cultural factors
- Personal habits
There are many different options to treating obesity. A mix of treatments may be most successful. It should include changes in diet, activity, counseling, or medicine.
You may need to try different diets before you see results. Diets can be designed by:
- Registered dietitians—talk to your doctor about a referral
- Internet- or commercial-based organizations such as Weight Watchers or Atkins
Different steps may help you. This may include avoiding certain types of foods. In general, the focus will be on increasing:
- Fruits and vegetables
- Whole grains
At the same time reduce:
- Saturated fats
- Refined carbohydrates—white breads, pasta, or rice
- Processed foods
Your and your doctor will find a plan that works best for you.
The key to weight loss is to reduce the total number of calories that you eat. Following a specific kind of diet, like a low-carb diet, is not necessary. It is much more important to choose a low calorie diet that you can stick with.
Portion, or serving size, also plays an important role. Learning how to read nutrition labels may help you succeed.
Keep track of everything you eat and drink. There are several tracking apps that can be used on your phone or tablet. It makes tracking much easier.
Ask your doctor about an exercise program. Even moderate-intensity exercise, like brisk walking, can help you lose weight.
There are many easy ways to add extra activity into your day. Take stairs instead of elevators. Park your car a little further away. Limit the amount of time you spend watching television. Decrease computer time and substitute it with activity.
There are many tools to help you track and measure your activity. This includes counting the number of steps throughout the day. Many of these tools can connect to apps on your phone or tablets.
Poor sleep can increase your risk of weight gain. Fatigue may also make you want to eat more and move less. Making small adjustments to your routine will help improve sleep:
- Get on a regular sleep schedule. Go to bed and get up around the same time every day. Continue even on your days off.
- Reduce noise, temperature, and light in the bedroom.
- Avoid caffeine, nicotine, and alcohol before bed.
- Eat a light dinner and avoid heavy evening meals.
- Create a relaxing routine before bed. Try taking a warm bath or reading a book.
Sleep apnea interferes with sleep. If you snore loudly or stop breathing during the night, talk to your doctor about getting a
. Sleep apnea is treatable and it will improve your overall health.
Behavior therapy may help you understand:
- When you tend to overeat
- Why you tend to overeat
- How to combat overeating habits
When combined with diet and exercise, therapy can help you with your weight reduction.
Weight Loss Programs
Weight loss programs may work for some people. A partner or group may also help you improve your eating habits and fitness.
Weight loss medicine may be prescribed. Medicine alone is not enough to lose weight and keep it off. Some medicine can have serious side effects. There are also risks associated with over the counter medicine and herbal products. Talk to your doctor before taking any of these.
Bariatric surgery makes the stomach smaller. In some cases, it will also rearrange the digestive tract. The smaller stomach can only hold a tiny portion of food at a time. Examples of procedures include:
These procedures may be a good option for people who are severely obese. It may also be recommended for people who are having trouble losing weight by other means.
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This option uses a balloon type tool. This balloon fills up the stomach creating a feeling of fullness. The device is inserted into the mouth and passed to the stomach. The device is removed 6 months after it is placed. Talk to your doctor for more information about this procedure.
Losing weight can be difficult. It is best to avoid weight gain. To reduce your chances of getting overweight:
- Keep track of your weight.
- Talk to your doctor or a dietitian about your daily calorie needs.
- Learn to eat smaller portions of food.
- Limit the amount of time you spend doing sedentary activities. This includes watching TV or using the computer.
Talk to your doctor or an exercise professional about working activity into your daily life.
Eat Right—Academy of Nutrition and Dietetics
Dietitians of Canada
Body mass index (BMI calculator). American Heart Association website. Available at:
http://www.heart.org/HEARTORG/HealthyLiving/WeightManagement/BodyMassIndex/Body-Mass-Index-BMI-Calculator%5FUCM%5F307849%5FArticle.jsp#.WrUYzS7wZQJ. Updated July 12, 2016. Accessed March 23, 2018.
Complications of obesity. EBSCO DynaMed website. Available at:
. Updated January 19, 2018. Accessed March 23, 2018.
Diets for weight loss. EBSCO DynaMed Plus website. Available at:
. Updated January 22, 2018. Accessed March 23, 2018.
Dietary guidelines for Americans 2015-2020. US Department of Health and Human Services website. Available at:
https://health.gov/dietaryguidelines/2015/guidelines. Accessed March 23, 2018.
Obesity. Merck Manual Professional Version website. Available at: https://www.merckmanuals.com/professional/nutritional-disorders/obesity-and-the-metabolic-syndrome/obesity. Updated December 2016. Accessed March 23, 2018.
Obesity, bias, and stigmatization. Obesity Society website. Available at:
Accessed March 23, 2018.
Obesity in adults. EBSCO DynaMed website. Available at:
. Updated January 19, 2018. Accessed March 23, 2018.
Physical activity for weight loss. EBSCO DynaMed website. Available at:
. Updated January 18, 2018. Accessed March 23, 2018.
Understanding adult overweight & obesity. National Institute of Diabetes and Digestive and Kidney Diseases website. Available at: https://www.niddk.nih.gov/health-information/weight-management/adult-overweight-obesity. Accessed March 23, 2018.
EBSCO Medical Review Board
Marcie L. Sidman, MD
- Review Date:
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