hey guys.... i am no expert whatsoever (and only 17) but lately people @ my gym have been seeing me squat deep and have been coming to me for advice on their squat. I feel flattered that people older and some more experienced than i am ask me for advice about their form, but at the same time even though i can spot errors i don't know how to help all of the time.
Today i was doing front squats and this guy came and asked to work in. I wasn't sure whether or not he was doing GMs or squats, and he said it was his first time doing squats and asked me for advice. I told him to keep his whole body tight, heels flat on the ground, and to stick his ass out to start the movement and then descend, and to push up off his heels on the way up. Every time he went down (he could barely reach parallel if that far) his back went down like he was doing a GM. I then told him to keep his head high and look at some sign on the wall, and even though his posture was great it still looked like he was doing a GM..
It got me wondering what the best ways to fix this problem are. I thought about it when i was showing him how to squat and couldn't think of anything about why his back kept going forward even when he was sitting far back into his squat- any ideas?