Gregory Marcus

I'm just going to move my dog.

Come on.

Oh, cappuccino, no doubt.

Buttercup has been removed for the moment.

So it's essentially like a very big Band-Aid, and it goes on the chest to the left of the sternum, essentially.

We instructed them, just push that button whenever you have a cup of coffee or a caffeinated drink.

Yeah, that's a good idea.

Interesting idea.

Well, in reality, Greg found... On days where people were randomly assigned to consume coffee, that evening, they, on average, slept 30 minutes less.

So people who say, oh, yeah, I can have a cup of coffee at night.

I go right to sleep.

They may be really telling the truth.

On days randomly assigned to coffee, participants on average exhibited a thousand more steps on those days.

It is a lot.

And in fact, there's other evidence that that magnitude of a difference may be meaningful in the long run in enhancing longevity.