Herman Pontzer: what people get wrong about metabolism

单集文稿 ...

• 00:03

  The Economist.

• 00:06

  This week, we'll be talking about the human body.

• 00:09

  In particular, how the body uses energy.

• 00:12

  I'm going to be speaking with a researcher who I've been fascinated by for a very long time.

• 00:17

  To explain why, I'll need to take you back to my childhood.

• 00:23

  Now, I was a pretty healthy but also pretty chubby kid.

• 00:26

  And for as long as I've had control over what I eat, I'm talking about after leaving home here,

• 00:31

  I've been hyper aware of ways to keep my weight and various edible temptations at bay.

• 00:39

  So I followed various fad diets over time, including at one point the original low-carb Atkins diet.

• 00:47

  And I've also spent a lot of time in gyms, on exercise bikes, cross trainers.

• 00:51

  I even tried out a spin class once and ended up vomiting straight afterwards.

• 00:56

  Never doing that again.

• 00:59

  Sometimes these diet and fitness regimes worked,

• 01:02

  but mostly they didn't because they were so hard to stick to.

• 01:07

  I did plough on though because through years as a science and health writer and speaking to many,

• 01:12

  many scientists,

• 01:13

  I had learned that to stay healthy involved watching what you eat and also making sure to move around a lot more.

• 01:21

  That was the science that had been ingrained into me.

• 01:24

  The only thing that mattered

• 01:26

  if you wanted to maintain a healthy weight was calories in versus calories out.

• 全部文稿