"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 ...

My glutes are still on fire.

As runners, we're often told we need to strengthen our glutes – and often by the physio when we’re injured. But why? What are the glutes actually doing when we run? And can glute bridges help? The ...