I am who I hang out with, that is why I easily gravitate to people that are health and energetic, and hang out with them regularly.

Energy in a person has surprisingly little to do with how well they are. Some of the most enlivening company in any hospital is attached to a drip.

The reliable test is what a room does to you afterwards.

There are people you leave feeling like the week is workable, and people you leave feeling like a case file. Neither has much to do with their fitness.

So the sorting worth doing is not by health. It is by what happens to your own energy in the forty minutes after they go home.