I don't really know if this is the right forum for this but here goes.
My lower back rounds at the bottom of my squat.
I've taken videos and I go well below parallel and it begins rounding when I go further than below parallel (ATG).
I'm sure this is a flexibility issue so could someone please give me some insight as to waht might be causing this rounding and some steps to fix it?
Also, I've tried to upload a video of me squatting so you can see what I mean but it doesn't seem to be going through, can I get some tech support for that too?