"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." You walk into the gym at 5:30 p.m. on a Tuesday, hyped up for you ready for your weekly run, when the ...

You walk into the gym at 5:30 p.m. on a Tuesday, hyped up ready for your weekly run, when the inevitable happens: all the treadmills are accounted for. You’ve been neglecting your cardio, and you know ...

"CARDIO MACHINE" HAS become a catch-all term to describe exercise bikes, treadmills, rowers, and ellipticals. Categorizing an entire section of your commercial gym can be practical, sure—but the ...