Unit 10 Obesity
Obesity in America
Beth Ruyak: Obesity rates in America are increasing at an alarming speed. In fact, 脚踝肿了是什么原因during the last 测试计划10 years, adult obesity incread by nearly 60 percent. And being overweight and physically inactive accounted for more than 300,000 premature deaths nationally—cond only to tobacco-related deaths. But what do you know about obesity? How is it defined? Are you obe? And what about the health implications—do you know the dangers associated with carrying too much weight?
Host:lt ems like everywhere you look, people are getting fatter and there are statistics to prove it.
Stern: Over 60 percent of our adult population is either overweight or obe.
Host: So what is obesity? It's defined as an excessively high amount of body fat in relation to lean body mass.
Stern:But we just can't measure body fat instantly, so we u a different measure called a body mass index.
Host: A body mass index, or BMI, is a common measure expressing the ration of weight to height. Here is the formula: Take your weight in pounds divided by your heigh删除表格t in inches squared and multiply that number by 704.Now you can also find BMI charts on the Internet.
Stern:If you're normal weight, your BMI is 20 to 24.9 and overweight starts at a 人力资源报告BMI of 25 and goes to 29.9,obesity is 30 and above and massive obesity is 40.
Host: If you are a 5-foot-5-inch woman, you're overweight if you weigh 150pounds becau your BMI is 25. You are obe if you weigh 180 pounds becau your BMI is 3天生嗓音好的特征0. Another way to tell if you're dangerously obe暑假的英文 is to measure your waist circumference.
Stern: If you're a man and your waist is 40 or more, that means you have upper body obesity, and you're carrying your fat in your belly. And if you're a woman, it's over 36.
Host: People who carry their weight in their belly, sometimes referred to as "apple shaped", are more apt to suffer from diabetes, heart dia, high blood pressure and the 30 or so other dias associated with obesity. But the good news is if you lo the weight, you decrea your risk for the dias too.
However, more people are gaining weight and at a quick pace. In1985, no states had an overweight/obe population over 15 percent. But by 1991, four states had an overweight/obe population of more than 15 percent, and as you can e, over the last decade, the number of red states increas dramatically to the point that the newest statistics will show every state in red!
Stern:We are winning that race for industrial nations, but other nations are catching up. And even China appealed to the World Health Organization for help with their obesity problem.
Host: So what has changed in the last decade? For one thing, we are eating more. Portion sizes have gotten out of control.
Stern: And now my son tells me that I can go to 7-11 and get the extreme super-duper gulp for 74 oz. You know, that's almost six 12-ounce cans of coke, well over 700 calories.
Man: Yeah, can I have a number 7? Can I go big on that or extra size with a Sprite?
Host: In 1990, McDonald's super size of fries was 540 calories. Today that's a "large" and the "super" is now a whopping 610 calories. Just remember that for every extra 3,500 calories you consume, you gain a pound of fat, which leads us to the other reason Americans are becoming more obe.
Stern: We exerci less. We're pretty dentary as a nation. And in fact, there are lots of things designed to keep us inactive.
Host: Things like elevators, escalators, and the biggest one—our cars !
Stern: I think we have to figure out how we're going to redesign our environment. We really have to do that. We have to be promoting physical activity.
Host:That would be good sta蜜蜂教学设计rt. A recent study found that 91 percent of people who lost weight and kept it off exercid regularly—at least an hour a day most days of the week.
Stern: On most days of the week, you want to try and walk at least 30 minutes a day, and aim for an hour, if you really want to keep that weight off.
Host: Becau if you're overweight or obe, you run the risk of developing rious health problems.
Stern:Most people want to lo weight to look better, but in fact, we should want to lo weight to improve our health.
Beth Ruyak:Losing weight isn't easy, but Judith Stern says losing just 10 percent成年人磨牙 of your body weight can have a huge impact on your health. And keep this in mind, one BMI unit is roughly equivalent to six pounds, so if you can lo six, you also drop your BMI.
