The refurbished precor efx 556i rxi provides a highly effective cross and total body workout the ramp rate is optimally set at 20 degrees to ensure the best possible range of motion for the lower body in combination with the moving handlebars a full body workout is possible key features of the refurbished precor efx 556i elliptical the patented motion allows your heels to remain in contact with foot pedals reducing muscle and tendon stress tap control tactile paddles control cross ramp an