Sure, working up a sweat torches calories, and that's reason enough to keep moving during the holidays. But what's even more critical, Peeke explains, is how exercise beefs up your brain.
"You're developing better behavioral circuitry. Addictive genes and obesity genes get deactivated," she says. At the same time, you're creating a different reward system. You can get the high you were looking for from the treadmill instead of the triple chocolate cake.
And that can lead to the best holiday gift of all: not having to commit to a New Year's resolution.