"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." THE BACK extension, that time-tested move for building back strength, has been around the block. But here ...

Today we're exploring an exercise that's often misunderstood but incredibly powerful: the weighted back extension. I'll break down what it does, who it's for, and how you can truly master it to build ...

Instead of using a back extension machine, try using the 45-degree back extension machine. This piece of equipment helps angle your body as you stand in it with straight legs, allowing you to bend ...