Andrew Huberman· PhD
So we settled on a group of hotel housekeepers. So these are women working in hotels who were on their feet all day long, pushing carts, changing linens, climbing stairs, cleaning bathrooms, vacuuming. It was clear that they were getting above and beyond at least the surgeon General's requirements at that time, or which were to accumulate 30 minutes of moderate physical activity per day. But what was interesting was when we went in and surveyed them and asked them, Hey, how much exercise do you think you're getting? A third of them said, zero. I don't get any exercise. And the average response was like a three, on a scale of zero to 10. So it's clear that even though these women were active, they didn't have that mindset, right? They had the mindset that their work was just work. Hard, maybe thankless work that led them to feel tired and in pain at the end of the day. But not that it was good for them, that it was good exercise. So what we did was we took these women and we randomized them into two groups, and we told half of them that their work was good exercise.