LETTER: This is a new take on the importance of getting exercise…

The study results:

They found that fitness levels, not weight, predicted whether or not a participant had died in the study’s intervening years. Unfit people, regardless of their weight, had twice the risk of dying during the study than fit people, and overweight and obese people who were fit had similar mortality risks as fit, normal weight participants.

Another way of putting it: thin, unfit people had twice the mortality risk as obese fit people.