Are you lazy and stressed? Do you want to be “biochemically, molecularly, calm?” Then run!

Scientists have long known that exercise stimulates the creation of new brain cells, and some believe that’s the reason working out tends to have an antidepressant effect. A study by Princeton scientists has found that cells that are created from running don’t respond to stress in the same way regular ol’ lazy-people cells do, according to an article in the New York Times.

These “exercise-created” cells express fewer stress genes than regular cells do in stressful situations. If you’re a rat.