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 and ...

Treadmills and ellipticals are two extremely popular machines you can use at the gym or buy for your own home. And there's a reason for that: Both get your heart rate up, work your lower-body muscles, ...