The new year is usually when new customers come to gyms to keep their New Year’s resolutions. Local 4′s Kim DeGiulio has been tracking the challenges gym owners face and has an update on the new year. Fitness and nutrition expert Jody Trierweiler had a few tips for what to keep in mind when bringing a mask to the gym. Her number one tip is to avoid masks that draw in moisture, since moisture breeds bacteria. Instead, Trierweiler says to find masks that are breathable, lightweight, and that are made using moisture wicking fabrics.