By default, airports and exercise don’t mix. Travelers are rushing to make a connecting flight (via a moving walkway) or using their terminal time to grab a quick bite to offset mid-air hunger in favor of a workout. Yet, one airport is attempting to set an exercise trend in lieu of sedentary travel behaviors like watching TV, reading—and eating. In June, the Philadelphia International Airport became the first airport in the United States to provide low-impact stationary bikes for travelers to use in the terminal, free of charge, while waiting for their flights. The equipment includes 30 free-standing cycling machines with a seat and pedals. Four elliptical machines also are moved between terminals each month as a pop-up gym. So if you are making a connecting flight at PHL during the holidays, perhaps you can grab a bike instead of a cheesesteak.