Participants attend the Group Indoor Cycle class at the Fitness Center on Royal Air Force Lakenheath, England, Jan. 8, 2019. Indoor cycling is a good alternative to running that puts less strain on your body while still doing cardio. The Lakenheath Fitness Center and Health Promotion offer free services to help you achieve your fitness goals. (U.S. Air Force photo by Airman 1st Class Madeline Herzog)