Originally Posted by BendtheBar
Well one good thing about squats is that even relatively light squats can have a big impact. Ask him about squats. A pic or video would be great, but I understand it's not always possible.
I don't know about the nature of his reconstructions, and if there are any lingering issues, but most heavy pulls and leg movements are going to stress the knee to a degree. One thing I recommend is finding out if his squat hesitancy is mental or physical.
Ken Adams says:
"I am squatting 70kg at my heaviest set at the moment(8 reps), in regard to deadlifts I will NEVER do them!! I know too many people who blew a disk and I am planning on training for many decades to come. And I am aware all the hardcore trainers will go on a rant that if your form is correct there is no danger but I am not interested."
And in answer to the question how heavy is too heavy:
"For me its not so much about lift ceilings, if I get to 10 reps then I will move up in weight"