Precor 544 EFX Rear Drive Elliptical Trainer, Resistance Type Cross Trainer Built For Commercial Fitness Club UseHeavy duty and built to lastOn the EFX, you stand upright while striding in a forward or reverse motion and holding handrails, which are designed for ergonomic comfort and a wide range of handholds. The electronically adjustable EFX r changes the slope of the elliptical stride, letti...