BTB Fitness is a family-run strength and conditioning gym located on Cleburne Terrace, just off Ponce De Leon Avenue and south of North Highland Avenue. An affiliate of CrossFit (an open-source athletic training program that incorporates exercises from multiple disciplines), BTB started in the mid-2000s as an outdoor-only BootCamp/training company. BTB now features indoor CrossFit and outdoor BootCamp training programs.