Happy Thanksgiving from Organic Authority! Expect to have your fair share of organic turkey, stuffing, mashed potatoes and pumpkin pie today? The average American consumes at least 2,500 calories and 86 grams of fat during a typical Thanksgiving dinner—the equivalent of eating 16 slices of pepperoni pizza!

If you haven’t joined a structured exercise program or gym, you can work out for free tomorrow at your local Bally Total Fitness club in honor of post-Thanksgiving “Fat Friday.” Bally’s goal: to help Americans kick off the holiday season with a healthy start.

Centers will open their doors to the public (minimum age: 18) at no cost to help you burn calories from your Thanksgiving feast. Trainers and nutrition experts will be available to offer tips and advice on preventing holiday weight gain, which plagues many Americans each year.

A recent Bally survey found that more than 70% of those polled gain 1 to 10 pounds between Thanksgiving and the New Year—weight that proves difficult to take off. Bally execs hope the free day of fitness will encourage Americans to make exercise a priority so they can stay fit.

To find a Bally Total Fitness club near you, call 1-800-FITNESS or use the company’s online locator.