Watch Lean, Strong and Healthy with Susan Powter (1993) : Full Movie Online Free In this installment of the Reebock exercise series, Susan Powter leads an energetic series of aerobic moves. Arm movements are added to the step routines to make the entire workout more extreme. The intensity of the routine can be adjusted by changing the range of your movements and adding or deleting the aerobic step. This high-energy video can be used by those at all levels of fitness.