F45 Training is a 45-minute HIIT workout that will challenge you like never before. The F stands for Functional Training, a mix of Circuit and HIIT-style workouts geared towards everyday movement. The 45 is the total amount of time for sweat-dripping and heart-pumping fun! With thousands of exercises in our database and a nearly infinite amount of combinations, members will almost never take the same class twice. F45 Training is here to bring you the world’s most innovative workout. Team Training - Life Changing!