Most gyms have an elliptical machine. And chances are, someone's on it—and using it incorrectly. The beloved piece of gym ...

Most under-desk ellipticals are straightforward machines: You put them underneath ... s not the lightest on this list (the budget-friendly folding option below is a quarter of the weight), at ...

Treadmills and ellipticals are two extremely popular machines you can use at the gym or buy for your own home.