"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 ...

Back extensions, hyperextensions, Roman chair extensions — whatever you want to call them, this back exercise is brilliant at strengthening the muscles along the back of your body, known as the ...

Innovation is as important as motivation in the world of fitness. After all, even the best of us can sometimes get bored of the same equipment and routine. The fitness industry tries to stay fresh ...