The Bill Hartman Podcast for The 16% - Season 10 - Number 6 Podcast
So we're back to Jordan's question about trying to get dorsiflexion on this kid. It's like, okay, you can yank and pull on that ankle all day long, but that muscle he's trying to influence does not want to change shape for a reason. And it's going to go, nope, not changing. Yank and pull all day long; it'll never change. Okay, so again, I can't change the expansion in that area. That's muscle behavior. Yeah, it also influences how much tension there would be in the connective tissues under that circumstance. So from a rate standpoint, that muscle is on right away, making the tissues high rate stiff too. Okay, all right. If that kid was doing a box jump, he jumps off the box and lands on the ground. The muscle is still concentrically oriented, but because there's more time to load the connective tissues, those connective tissues will elongate. That's a yield. So that's a change in the actual storage and release of energy in the connective tissues, which is a length change in the connective tissues. But the muscle orientation is exactly the same. It's still concentrically oriented under that circumstance. Because if it is concentrically oriented, my ankle would move more and I would reduce the tension on the connective tissues. I would distribute that force and it would dampen and it would land softly. Do you see the difference in the behavior of the muscle versus the connective tissues?
connective tissue behaviormuscle orientationrate dependent behaviordorsiflexioneccentric vs concentric muscle