First two minutes of this vid are worth a watch. Lu xiaojun's traps look as if they are ready to pop once the bar is "nestled" on them.
I think it's likely linked to getting a bounce off the calves out of the hole. Allowing the torso to tip forward a bit means the knees can come back a bit too. But then the torso has to come back into a more upright position to keep the bar racked and to finish the lift, so the knees have to go back out so the hips can come forward.Massive knee shift.
ME front squats don't seem like a good thing to do very often, to me at least.
I think it's likely linked to getting a bounce off the calves out of the hole. Allowing the torso to tip forward a bit means the knees can come back a bit too. But then the torso has to come back into a more upright position to keep the bar racked and to finish the lift, so the knees have to go back out so the hips can come forward.
Stronger adductor and hams would no doubt help.
Yes, I'm sure you're right. This happens to me too during ME lifts for front and back squats. Some folks seem to exhibit this and some don't. All I know is that I ought to be able to maintain the same knee and torso positions on the way up as I did on the way down. I can do this for a 90% 1RM lift but not if I go above this. So, I think it points to relative strength imbalances between quads and hams/adductors. It can't be spinal erectors because the loads are relatively light compared to deadlifting and so spine doesn't flex (noticeably) under the load. I may try introducing GHR work as this is something I've never bothered with much. Or perhaps a few cycles of SLDLs and see if that helps any.Knees going back out is a must, obviously. Knees going in to begin with? A bit scary I think.