Elliptical feeling a bit too easy? Try changing up a few things. (Getty Images) The first time I hopped on an elliptical was not how I planned it going. The machine was moving faster than my arms ...

Instead, you place your feet on pedals that move in a circular or elliptical pattern. It’s similar to the way bike pedals move in a circle, though you remain standing on an elliptical machine.

Both cardio machines can help to raise your heart rate, the key is determining which will help you achieve your other goals ...

And if you're moving efficiently on the elliptical, using the right combination of leg and arm motions, the amount of calories you'll burn in an hour is similar to a treadmill.