If you work out at a health club you probably noticed that in the last few years there are fewer treadmills, because they are being replaced by elliptical trainers. And although treadmills still outsell ellipticals in total numbers, elliptical sales are growing at a faster rate.

What is driving the popularity of elliptical trainers? There are two factors that make elliptical trainers so appealing:

Benefits of a Low Impact Workout

Most types of exercise require some type of impact and/or reverse action. For example, when you walk each step is impacting force on your ankles, knees and lower back. That impact is minor in comparison to running, which can be as much as 2.5x your body weight. Over the years that constant pounding can result in long-term injuries and strains.

Elliptical trainers reduce the hazards of impact through an elliptical motion.It feels like you are naturally walking or running without any real impact or reverse action, and yet it is a weight bearing exercise that contributes to building muscle and bone density.

If you look at the side of an elliptical trainer you