For my entire lifting career I’ve been hearing gym bros telling roundback deadlifters that they’re lifting with “all back.” They think the leg muscles are silent and the back muscles are actively doing all the work. But this isn’t the case. It’s true that the quads aren’t doing as much work, but the hip extensors still have to extend the hips, and the erectors are actually activated to a much lesser degree (even though you feel it more in the back...simply because it’s pinching the discs and stretching various ligaments and the erectors). I don’t think this video will go viral and change gym culture in the slightest degree; I just wanted to educate those of you who care about biomechanics on an interesting phenomenon. Hope you enjoy today’s lesson!

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