When looking for an elliptical trainer, whenever possible opt for a rear drive system rather than a front drive system. Rear drive machines are far sturdier, more reliable, and provide a smoother motion for the user. The resistance system will vary according to price, with the least expensive models using a manual system, mid-range models using a manual system, mid-range models using a motorized brake system, and the most sophisticated high-end models employing an eddy current brake system. Stride length is another important thing to keep in mind, because different people have different natural strides. Look for an elliptical trainer that allows you adjust the stride length to suit your own body style and stride length. Consider Your Choices Stationary bikes have been around for several decades, yet they remain popular as simple, easy to use home fitness equipment. A power rod machine uses flexible rods of varying stiffness connected to a cable and pulley system, the weight of their body creates the resistance they will experience. Power rod equipment typically requires less space than a traditional home gym usually requires quite a bit