Rachel Eustis instructs the following:
E.P.I.C. (Efficient/Power/Interval/Circuits) training system combines interval training concepts with full-body strengthening techniques in a time efficient format. TRX E.P.I.C. is dynamic group training that gives you the most productive workout in 45 minutes. This workout is for all skill levels and will help you build strength, cardiovascular endurance, flexibility, balance, core stabilization, gain lean muscle, and remain safe in your daily routine. We uses Suspension Training along with other functional modalities to give you the most functional and challenging full-body routine.