-
If we look at two different foods here, broccoli and the brownie on the right, they're of course much different in calories but they're different in other ways.
让我们看看两种不同的食物,左边花椰菜,右边布朗尼蛋糕,它们除了卡路里含量不同,还有其他差别
-
How do you know what foods are in calories?
我们如何知道食物有多少卡呢
-
It turns out everything around us moves energy around in one way or the other If you're a biological system, you're burning calories, burning ATP.
我们周围的一切物质,都以这样那样的方式传递着能量,如果你是一个生物系统，你会燃烧卡路里，燃烧。
-
The ones who would seek out calories, the ones who could store and not waste energy, those with an efficient metabolism-- that is those people who took in calories and banked them into their body fat and stored against subsequent famine-- are the ones who would do the best under these circumstances.
那些寻找能量的人,那些储存而不浪费能量的人,那些有着高效代谢系统的人,那些人可以将摄入的热量储存为机体脂肪,以用于对抗即将到来的饥荒,在早先的情况下他们是最适应环境的
-
We'll talk specifically about how many calories people are consuming in liquid form which has gone way, way up.
我们将具体谈论人们从饮料中,摄取的卡路里量,这个数字直线上升
-
So how many calories, and how much fat, how many grams of fat would you say are in the following foods?
你们认为以下食物中,有多少卡路里,多少克脂肪
-
But also, switching out the trans fat in another kind of fat doesn't change the calories at all.
同样地,用其它的脂肪来代替,反式脂肪酸不会改变食物的总热量
-
So if you were wanting a pretty precise number on how many calories are in a food, you'd send it to a lab.
所以如果想要一个精确的,食物所含卡路里的数值,就把食物送到实验室
-
As a consequence, and of course there's stuff on them and in them that changes the calories.
当然里面还夹了别的配料,使得卡路里更高
-
Then you can look at the number of calories per --from fat that's offered in the food.
下面能看出食物中有多少热量来自脂肪
-
Now you're saving a few calories because you don't even have to do that, so the food environment's changed in a lot of ways.
现在不需要这样,又节省了些力气,所以说食品环境改变了很多
-
Calories go in, food gets consumed, the body metabolizes or makes use of those particular nutrients.
热量摄入,食物消耗,机体新陈代谢,即利用那些营养物质
-
By the way, for the Grande Salad, how many of you underestimated the calories in that?
对了,关于大份沙拉,你们中多少人低估了热量
-
Okay, so once you reach 2 000 calories you don't want to put anything else in.
好的,所以你一旦摄入了2000卡路里,教授在上节课曾提到2000卡路里是正常成年人平均一天的卡路里需求量 你就不会再想吃别的东西了
-
And what they found was they underestimated by 200-600 calories, the calories in these foods.
结果,营养学家们把这些食物的卡路里,低估了200到600卡
-
We're going to talk in this class a lot about beverages, and it's interesting how the population consumption of calories through beverages has gone way up.
我们会在这堂课上讨论一下饮料问题,人们如何通过饮用大量饮料获取热量,这个问题很值得关注
-
Your body interprets liquid calories different than it does calories in solid food.
你身体以不同的态度,对待饮料和固体食品中的卡路里
-
In this particular study, we took thirty people who enter in a weight loss clinic and we had them estimate the calories in these sort of common foods.
在这个实验中,三十人进入了一家减肥专科门诊,让他们估计一些普通食物中的卡路里
-
How many of you were pretty consistent in underestimating the calories?
你们中多少人一直在低估卡路里
-
Now this is a little counterintuitive, because very often people underestimate the amount of calories in things, but what's important here is the-- the error, the size of the error.
这与我们的直觉有些相反,因为经常性地,大家低估了卡路里含量,重要的是,误差和误差的大小
-
Were you surprised by how many calories were in some foods?
你会因为某些食物的卡路里含量而惊讶吗
-
So, how well can you estimate the calories in things?
那么,你们是否能很好地估测卡路里呢
-
The calorie density has changed because food is processed, so the calories in the fat and the sugar that can get squeezed into things made possible by technological changes has shifted things a lot.
食品经过加工,热量密度发生了变化,添加到食品中的脂肪和糖类,其卡路里含量可通过技术手段进行调整,进而造成很大不同
-
They're the ones who would seek out high fat, high sugar diets because then they would get calories to seek out a variety of food, to eat in--eat above what immediate hunger might dictate.
这些人追求高脂高糖饮食,以获得足够能量,继而寻找更多种食物,饥饿驱使他们吃可以迅速果腹的食品
应用推荐