Originally Posted by Fazc
It's just basically too heavy, the knee's come forward to relieve stress off your back; that's solely because it's too much weight right now.
I think if we can see a video next time of you with around 60kg then we could actually get a handle on what your proper form is, I could probably provide you with more feedback. But this was just too much weight and it effected your form far more than I could really comment on.
OK mate, ill get a vid with 60kg next time