Dr. Layne Norton

And people also, well, I'm still doing the same amount of exercise.

Yeah, but if you're not spontaneously moving as much, and I don't know what it is about NEAT.

People view it as like a personal attack when I say physical activity.

No, this might as well be BMR because you can't control it.

Like your subconscious physical, now you can try to make up for it by doing more conscious physical activity.

And also I want to be very clear.

It's not like you lose 10% body weight and then everything falls off a cliff.

This is a very progressive thing over time, right?

But

You – knowing that, you can make up for it.

So for example, you can do more exercise or you can do more steps during the day, that sort of thing.

But when it comes to menopause, I think – and there is some evidence that like if you get like really low in estrogen and you replace that, that can have an effect on energy expenditure about 100 calories per day, something like that.

And then there's obviously – there are hormones that do make a difference for energy expenditure like thyroid hormone, right?

If you're hypothyroid, it will reduce your BMR.

But I think the biggest decline I've seen, like the biggest absolute max I've seen in the literature is like 25 percent, which is big as BMR.

But it doesn't mean you can't get into calorie deficit.

You're not a perpetual motion machine that can create energy out of nothing.

Like you have to – if you didn't lose weight or you didn't gain – or you gained weight,

your body didn't create those carbons out of nowhere.

Like they came from something, right?