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"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 ...

WHEN IT COMES to training your lower back, it doesn’t get more straightforward than back extensions. This old school classic is a bit more nuanced than you might think, however—and that makes ...

In TODAY.com’s Expert Tip of the Day, a trainer shares her favorite hack to perfect your deadlift form and prevent lower back pain.