Earlier in may, I sustained a disk injury in my lower back. I examined my squat form and deadlift form and realized a rounding of the lower back could be the cause, so I worked on hamstring flexibility and my hip flexors. The thing is, I’m able to execute a bodyweight squat with near perfect form. My depth is ATG and my spine is perfectly neutral. I practice multiple times throughout the day to really embed the motor patterns. However the moment a barbell is put on my back, things seem to change. Using a mirror that provides a side view, I’ve noticed that I do lose a bit of my lordosis in my lower back. I’m beginning to think this maybe the reason why I’m stalling on my squats. I was wondering if anyone could provide me with some input on how the mechanics might have to change once a bar is put on your back. I feel like I’m missing something.