"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." A glute-hamstring developer, commonly known as a GHD machine, is a large, specialized piece of equipment ...

Not every piece of fitness equipment is easily recognizable. While you’re probably quick to identify a bench press or squat rack when you walk into a training center, there’s always one piece of ...

Add Yahoo as a preferred source to see more of our stories on Google. Credit: Getty Images GHD sit-ups are the type of advanced abs exercise reserved for those in the gym who like to send their core ...

Dana Santas, known as the “Mobility Maker,” is a certified strength and conditioning specialist and mind-body coach in professional sports. She is also the author of “Practical Solutions for Back Pain ...