F45 Training: Never Heard of It? You Will — and Soon

One of the big differences between F45 and other small-format gyms is its content. The fitness teams at the mothership in Australia work with a bank of over 3,000 exercises to design 27 different workouts that are then delivered to each studio on a quarterly basis. The workouts — sporting hardcore names like "Althetica" and "Romans" — change daily and are described in sweat-soaked detail on F45's website. The intervals, rest periods, sets, and stations are preprogrammed in advance. Work intervals are typically under 45 seconds with shorter rest intervals with three or more rounds per station.