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A statistic
frequently used about obesity treatment is that 95 percent of
people who lose weight gain it all back. That statistic, based
on a small study from 1959, is no longer valid. Much has changed
in the way of obesity treatment since then. Thousands of people
have succeeded in losing weight and keeping it off -- an
encouraging fact for many that are discouraged by outdated
information. There are several different types of effective
treatment options to manage weight including: dietary therapy,
physical activity, behavior therapy, drug therapy, combined
therapy and surgery.
Weight loss of about 10 percent
of excess body weight is proven to benefit health by reducing
many obesity-related risk factors. Recommendations for treatment
are now focusing on 10 percent weight loss to help patients with
long-term maintenance of weight loss. Health professionals
including physicians, nutritionists, exercise physiologists,
psychologists and bariatric surgeons help persons with
overweight and obesity to determine the most appropriate
treatment.
This fact sheet is intended to
give an overview of each treatment option and does not take the
place of medical advice from a health professional.
Assessment of Weight
- Body Mass Index (BMI), waist
circumference and medical history should be evaluated to
determine the degree of a patient’s risk from excess weight.
BMI > 25 defines
overweight and marks the point where the risk of disease
increases from excess weight.
BMI > 30 defines
obesity and marks the point where the risk of death
increases from excess weight.
Waist circumference of >
40 inches in men and > 35 inches in women increases
disease risk.
Dietary Therapy
- Dietary therapy involves
instruction on how to adjust a diet to reduce the number of
calories eaten.
Reducing calories moderately
is essential to achieve a slow but steady weight loss, which
is also important for maintenance of weight loss.
Strategies of dietary
therapy include teaching about calorie content of different
foods, food composition (fats, carbohydrates, and proteins),
reading nutrition labels, types of foods to buy, and how to
prepare foods.
Some diets for weight loss
include low-calorie, very-low calorie, and low-fat.
Physical Activity
- A decrease in the amount of
daily activity related to work, transportation and personal
chores is believed to contribute to the high percentage of
overweight and obesity today.
Moderate physical activity,
progressing to 30 minutes or more on most or preferably all
days of the week is recommended for weight loss.
Physical activity is
reported to be a key part of maintaining weight loss.
Abdominal fat, and in some
cases waist circumference can be modestly reduced through
physical activity.
Strategies of physical
activity include: the use of aerobic exercise (such as
aerobic dancing, brisk walking, jogging, cycling, and
swimming), beginning slowly and gradually increasing
intensity, and selecting enjoyable activities that can be
scheduled into a regular routine.
Behavior Therapy
- Behavior therapy involves
changing diet and physical activity patterns and habits to
new behaviors that promote weight loss.
Behavioral therapy
strategies for weight loss and maintenance include:
- Recording diet and
exercise patterns in a diary.
Identifying high-risk
situations (such as having high-calorie foods in the
house), and consciously avoiding them.
Rewarding specific
actions, such as exercising for a longer time or eating
less of a certain type of food.
Changing unrealistic
goals and false beliefs about weight loss and body image
to realistic and positive ones.
Developing a social
support network (family, friends or colleagues) or
joining a support group that can encourage weight loss
in a positive and motivating manner.
Drug Therapy
- Drug therapy is recommended
as a treatment option for persons with: 1) a Body Mass Index
(BMI) > 30 with no obesity-related conditions or 2) a
BMI of > 27 with two or more obesity-related
conditions.
Drug treatment should be
used with appropriate lifestyle modifications.
Drug therapy may be used for
weight loss and weight maintenance.
Patients should be regularly
assessed to determine the effect and continuing safety of a
drug.
Three weight loss drugs,
approved by the US Food and Drug Administration (FDA) for
treating obesity, are Orlistat (Xenical), Phentermine, and
Sibutramine (Meridia).
- Orlistat works by
blocking about 30 percent of dietary fat from being
absorbed, and is the most recently approved weight loss
drug.
Phentermine, an appetite
suppressant, has been available for many years. It is
half of the “fen-phen” combination that remains
available for use. The use of phentermine alone has not
been associated with the adverse health effects of the
fenfluramine-phentermine combination.
Sibutramine is an
appetite suppressant approved for long-term use.
Combined Therapy
- A combination of a diet
(with lower calories) and increased physical activity is
reported to produce more weight loss than diet alone or
physical activity alone.
A combination of behavior
therapy and drug therapy could prove to be an effective
treatment for obesity.
Drug therapy appears to
assist in the adherence to dietary therapy (low-fat,
low-calorie diet), and may improve maintenance of weight
loss.
Surgery
- Obesity surgery is
recommended as a treatment option for persons with obesity
that have: 1) a BMI > 40 or 2) a BMI of 35 to 39.9
with serious medical conditions.
Obesity surgery is used to
modify the stomach and or intestines to reduce the amount of
food that can be eaten.
Surgery is a
well-established method for long-term weight control for
persons with severe obesity.
Much progress has been made
to develop safer and more effective procedures used in
obesity surgery today.
Before surgery, patients
should be informed about the risks and benefits.
Patients should be motivated
and committed to making a lifestyle change after surgery.
A medical team, including
behavioral and nutritional professionals, should be part of
a life-long follow-up plan.
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