Les Mills has a unique style for their aerobic steps so their risers and platform shape are different than ours. However, the Les Mills Body Step, Body Pump and Grit workouts and exercises can all be done using our new aerobic step. (We love Les Mills and use our aerobic step to do these workouts ourselves!) Our aerobic step style is roughly the same dimensions as the aerobic step used by Cathe Friedrich in her workouts where she uses a gym-sized step. We're huge fans of step workouts by Cathe Friedrich!