The term “elliptical” refers to the pattern the pedals make when the machine is viewed from the side. The first elliptical machine of any meaningful value was unveiled in 1995. Since then, it has become an increasingly popular piece of equipment for aerobic training.

But how does it stack up against the ever-popular treadmill? Studies have shown that the physiological responses of using an elliptical and treadmill are similar (such as maximum heart rate, maximum oxygen intake and the respiratory exchange ratio). So why does it feel so much easier to use an elliptical? The reason is probably because it’s a non-impact activity that doesn’t involve the pounding associated with a treadmill.

Many elipticals have an upper body component that allows users to address all major muscle groups, not just those in legs and hips. Using this type of elliptical can produce an even greater expenditure of calories.