alan tseng said:Not exactly, posterior pelvic tilt isn't flattening your lower back, it's more like posterior pelvic tilt causes your lower back to flatten. PPT is a hip movement not a lower back movement. Lumbar spine flexion would be a lower back movement, and lumbar spine flexion is different than PPT
This seems a bit semantic to me.
From an anatomical perspective you're obviously correct. At the same time, I think it would be physically impossible to engage a PPT without altering the curve of the spine, so really I don't think you can separate the two and say it's entirely one or the other.
But in terms of physical cues that one can understand on an individual basis, I've found that flattening the lower back is what helps most people (and myself) understand what a proper PPT is. So while technically incorrect in terms of strict definition, I think equating the PPT directly with the position of the lower back to be the most useful in terms of learning body position. But that's just my experience. ![]()