Seems like, stomach-narrowing surgery does not just augment your beauty but also aids in easing the chronic knee pain. According to a NYU School Of Medicine-led study, extremely obese people who have a band surgically strapped around their stomachs to restrict food intake not only lose weight but also suffer less from arthritic knee pain. According to the statistics, more than 1,30,000 Americans have had the procedure done since 2011. Although the operation is considered relatively safe, complications may include nausea, stomach ulcers, and infection. The study, authors said their findings are especially important because one in three American adults is now overweight. Studies also showed that the number of Americans with osteoarthritis has more than doubled since World War II. The main purpose of the survey, researchers said, was to find out why some extremely obese people showed more knee-pain relief from lap-band surgery than others. Study participants had an average body mass index, or BMI, of 40, which equates to a 5 feet and 10 inches-tall man who weighs about 280 pounds, or a 5 foot 6 inches-tall woman who weighs 250 pounds.