X⁴ is a HIIT fitness methodology with four unique blocks critical to the programming - TrueForm, TRX, Strength and Capacity. While the stations remain the same, the movements performed and equipment used in each station varies daily in order to keep members engaged and challenged. With proven success stories, the X⁴ workout routine is guaranteed to be fresh and unique each and every day. X⁴ was created by Chris Wade, founder of Nexus Fitness in Homewood, Alabama, as a way to attract new members with an approachable workout for everyone. Founded on community and built on effective methodology, X⁴ draws people from all walks of life and fitness backgrounds.