[ti:Study: Half of Americans Will Be Obese by 2030][by:shang05.com][00:00.00]更多听力请访问shang05.com[00:00.04]Within 10 years, nearly half of American adults will be obese—or very overweight—a new report predicts.[00:13.68]In addition, the researchers warned that one in four Americans will be severely obese.[00:23.52]The new report used a federal study that lasted more than 20 years and included data from 6.3 million adults.[00:35.64]The researchers made predictions for the future based on current trends.[00:43.08]Their study corrects for a weakness in earlier studies.[00:48.24]Before, research usually depended on national health surveys[00:54.48]in which people often reported their weight as less than it really was.[01:01.32]"It's alarming," said nutrition expert Dr. Lawrence Appel of Johns Hopkins University.[01:10.64]He was not involved in the study.[01:13.72]"We're going to have some pretty awful problems" medically and financially[01:20.16]because so many people weigh too much, he said.[01:26.16]The New England Journal of Medicine published the study in December.[01:30.76]It was the result of work by researchers at Harvard and George Washington universities.[01:39.40]The chief writer of the study, Zachary Ward, is with Harvard T.H. Chan School of Public Health in Boston.[01:50.48]He spoke about the findings with Reuters news service.[01:55.48]"Obesity is getting worse in every state," he said.[02:00.04]"And especially concerning is severe obesity, which used to be pretty rare"[02:07.48]and which now will be the most common group for a lot of states across the country.[02:16.04]Most affected will be women, blacks and low-income adults.[02:22.68]The study said nearly one third of people in those groups will be severely obese.[02:31.28]Obesity can result in many health problems.[02:35.16]The risk for heart disease, stroke, diabetes and cancer all go up when someone is severely overweight.[02:45.40]Obesity is generally defined by a person's body mass index number, or BMI.[02:54.24]This is the measure of weight compared to height.[02:59.64]A BMI of 30 or greater is considered obese.[03:06.60]The Centers for Disease Control and Prevention (CDC) estimates that 40 percent of U.S. adults are obese.[03:17.24]The new research predicts that by 2030, about 49 percent of U.S. adults will be obese.[03:27.96]In 29 states, more than half will be.[03:34.48]In addition, about one fourth will suffer severe obesity.[03:41.64]The study did not look at the reasons behind the increases,[03:46.88]but "income is a big driver. Age is a big driver," Ward said.[03:54.80]States with younger people have lower obesity rates because people usually "gain weight as they age."[04:04.04]The state with the lowest obesity rate will be Colorado, which has always had lower rates.[04:12.84]Ward said people in Colorado do a lot of outdoor activities, and they may have higher income.[04:22.88]He added that living at higher elevations, like Colorado might also influence the results.[04:32.56]"There may be something about having to take a little extra energy[04:38.72]to do everything at a higher altitude" that keeps weights lower, he said.[04:46.48]The study was paid for by the JPB Foundation, which studies poverty and problems in society.[04:55.68]However, there have been some other hopeful developments in the effort to limit obesity.[05:03.84]In June, the CDC reported decreasing obesity rates among the youngest school children on government food aid.[05:15.56]Obesity among these children fell from 16 percent in 2010 to 14 percent in 2016.[05:26.64]I'm Anne Ball. 更多听力请访问shang05.com