Bill Hartman 31:25–31:29
Here's the mistake. You called it a glute bridge. So right away, you're thinking muscle, glute max, all I gotta do is get you to feel a glute max. When the reality is, it's a little bit more complex than that because if you try to do a bridge where you're lifting the hips off the table without internal rotation capabilities, those are the people that go, do you feel your butt? And they are squeezing it together like nobody's business. Like if you stuck $100 bill in there, you're never getting it back. And then they ER the proximal femur, their knees try to separate, right? And they're getting a really strong glute contraction. So it's a glute bridge, but you're not achieving what you intend to achieve, which is to maintain that measure of internal rotation. Remember, they're both there at the same time. It's not an either or. It's an ER representation. You're moving from the ER representation towards internal rotation. When you lift up your hips off the table in that bridge, you're moving closer to internal rotation. If you don't have internal rotation capabilities, then you would ramp up all of those ER muscles in an attempt to try to bring the legs together at the same time. And then that's where you get the cramp. That's why the people that complain about hamstring stuff is like, anytime that they're trying to lift their hips off the ground, they don't have any IR with them. It's all ER stuff.
glute bridgeinternal rotationexternal rotation