Dr. Rangan Chatterjee

Let's take to an extreme the David Goggins mentality, for example.

David Goggins is a human embodiment of one of those rats in the study, right?

Exactly, he won't stop, he will just persevere.

But you can injure yourself as well through that perseverance.

So of course, the 10 year old boy trying to save his life and his family's life, he doesn't care if he gets injured, right?

Because it's like,

this is life-threatening.

But if you're running a recreational marathon and we see so many marathon runners doing this, they push past pain, they have their identity built up around completing this marathon.

And I know this from chatting to running coaches, there are quite a lot of people who wreck themselves for good because they have that mentality, I'm going to complete this marathon no matter what.

I know that's not what you're saying in the book, but can you help us understand how that could go too far, perhaps?

Yeah, so it's a beautiful framework that I feel we can all apply to anything we're trying to bring into our life.

This might be a good time to speak about your weight loss journey.

I think because it sort of relates, I think, to what we're talking about.

Looking at you today, it's very, very hard to believe that at some point in your life, you were clinically obese.

Yeah, I'll show you the photos.

Can you walk us through that journey and why it was belief that changed your outcome?

That is such a great piece of practical advice, isn't it?

Instead of

you know, we're not at New Year at the moment, right?

But in New Year, you know, people get carried away.