The Bill Hartman Podcast for The 16% - Season 13 - Number 10 Podcast
And the reason being is because if you went into your deepest squat ever with a PR load, you're never getting out of it because you would dampen so much at the bottom because the connective tissue behaviors would be yielded. The yield would just expand throughout your system, and you would not be able to recapture the energy to recoil yourself back up. So you limit the ER exposure to keep the connective tissues stiff enough so that they deform and store more energy and release. But it's a re-ER-ing at the bottom.
squat biomechanicsconnective tissue behaviorenergy transferexternal rotation (ER)