"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 ...
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 ...
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 ...
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