Chest up more, bum down, too.
Chest I can agree with, as said, its my highest working set I've done so it's going to be sloppy
With regards to my bum, I have to keep it high at the start otherwise my hamstrings are just non-existant (thats what it feels like anyway) Might be due to the narrow stance, but thats what im using currently...Will have a play
Chest up it s, then.
Try hard, though, as it will make it more of a push through the hips rather than pulling with your back.
maybe you should up your starting weight and lower to 110 or even 100 for your top set and up the rep's, so you build up some stamina before you up the weight even more.
never been one to chase 1 rep maxes, id rather be able to shift a big weight over a few reps/sets than just 2 or 3 reps and have to stop. plus less chance of blowing something out.
again just my little ole view on it.
think iv said this before to you but maybe lower the weight and up the reps to see if its really the reps or the weight thats aggravating the injury. im in a similar boat with my right knee thankfully i think im moving past that now, but it has taken a few months of not going nuts on squats.
finally getting my numbers back up now!! Squatted 120kg for 5 yesterday and got my bench to 110 for 5. just need to get my deadlift going again up too 200 and ill be happy!!
will try to get some vids up soon too