1. Weight Gain Shockers Slideshow Pictures
2. Take the Quiz on Belly Fat
3. The Best Diet Tips Ever Slideshow Pictures

Medical Author:

Jerry R. Balentine, DO, FACEP

Jerry R. Balentine, DO, FACEP

Dr. Balentine received his undergraduate degree from McDaniel College in Westminster, Maryland. He attended medical school at the Philadelphia College of Osteopathic Medicine graduating in1983. He completed his internship at St. Joseph's Hospital in Philadelphia and his Emergency Medicine residency at Lincoln Medical and Mental Health Center in the Bronx, where he served as chief resident.

View Full Profile

Medical Editor:

Melissa Conrad Stöppler, MD

Melissa Conrad Stöppler, MD

Melissa Conrad Stöppler, MD, is a U.S. board-certified Anatomic Pathologist with subspecialty training in the fields of Experimental and Molecular Pathology. Dr. Stöppler's educational background includes a BA with Highest Distinction from the University of Virginia and an MD from the University of North Carolina. She completed residency training in Anatomic Pathology at Georgetown University followed by subspecialty fellowship training in molecular diagnostics and experimental pathology.

View Full Profile

In this Article

• Obesity facts
• What is obesity?
• How common is obesity?
• What are the health risks associated with obesity?
• What causes obesity?
• What are other factors associated with obesity?
• How is body fat measured?
• What about weight-for-height tables?
• What is the body mass index (BMI)?
• Does it matter where body fat is located?
• What can be done about obesity?
• What is the role of physical activity and exercise in obesity?
• What is the role of diet in the treatment of obesity?
• What is the role of medication in the treatment of obesity?
• What about herbal fen/phen?
• What about meal substitutes, artificial sweeteners, and OTC products?
• What is the role of surgery in the treatment of obesity?
• How can patients choose a safe and successful weight-loss program?
• Patient Comments: Obesity - Effective Treatments
• Find a local Internist in your town
• Obesity (Weight Loss) Index

The National Health and Examination Survey (NHANES I) showed that people who engage in limited recreational activity were more likely to gain weight than more active people. Other studies have shown that people who engage in regular strenuous activity gain less weight than sedentary people.

Physical activity and exercise help burn calories. The amount of calories burned depends on the type, duration, and intensity of the activity. It also depends on the weight of the person. A 200-pound person will burn more calories running 1 mile than a 120-pound person, because the work of carrying those extra 80 pounds must be factored in. But exercise as a treatment for obesity is most effective when combined with a diet and weight-loss program. Exercise alone without dietary changes will have a limited effect on weight because one has to exercise a lot to simply lose 1 pound. However regular exercise is an important part of a healthy lifestyle to maintain a healthy weight for the long term. Another advantage of regular exercise as part of a weight-loss program is a greater loss of body fat versus lean muscle compared to those who diet alone.

• improved blood sugar control and increased insulin sensitivity (decreased insulin resistance),
• reduced triglyceride levels and increased "good" HDL cholesterol levels,
• lowered blood pressure,
• a reduction in abdominal fat,
• reduced risk of heart disease.

Remember, these health benefits can occur independently (with or without) achieving weight loss. Before starting an exercise program, you should talk to your doctor about the type and intensity of the exercise program.

• Perform 20-30 minutes of moderate exercise five to seven days a week, preferably daily. Types of exercise include walking, stationary bicycling, walking or jogging on a treadmill, stair climbing machines, jogging, and swimming.
• Exercise can be broken up into smaller 10-minute sessions.
• Start slowly and progress gradually to avoid injury, excessive soreness, or fatigue. Over time, build up to 30 to 60 minutes of moderate to vigorous exercise every day.
• People are never too old to start exercising. Even frail, elderly individuals (70-90 years of age) can improve their strength and balance.

The following people should consult a doctor before vigorous exercise:

• Men over age 40 or women over age 50
• Individuals with heart or lung disease, asthma, arthritis, or osteoporosis
• Individuals who experience chest pressure or pain with exertion, or who develop fatigue or shortness of breath easily
• Individuals with conditions or lifestyle factors that increase their risk of developing coronary heart disease, such as high blood pressure, diabetes, cigarette smoking, high blood cholesterol, or having family members with early onset heart attacks and coronary heart disease
• A patient who is obese