Today i’ve injured my lower back during belted squats on the bridge 1.0. I’m on week 4 high stress and while warming up i got to around 80kg and this started feeling like RPE 6/7. Last week i squatted 105kg for 3x5@8. Being rather stupid and not listening to the RPE i kind of told myself “this cant be a @6” and pushed on. I ended up getting to 95kg and had to back off the weight due to creeping up to @8.5/9 and my low back taking a beating. Can this be that last week i got 105kg at a decent 8RPE and this week only 95kg. I understand that the aim is to try add weight the bar week to week and that was the issue today. I was aiming for 107.5kg for RPE8 and overlooked my body telling me 80kg was the start of the RPE range for today. I need to get better at judging. I now have some SI joint pain to deal with and rehab. Due becoming injured i could not get the prescribed Rack pulls as my back was not up to pulling from mid-shin but seemed to be ok with RDLs.
Hey Tate,
Thanks for the post and I hope you’re feeling better. I’m having a difficult time teasing out your actual question here, however. Can you clarify? Would love to help where possible 
Yeah, so basically last weeks belted squat i got to 105kg 3x5 @8 and tried to 107.5kg this week but as i was working up i got to 80kg and i started to feel like i was getting into RPE range. Due to getting 105kg last week i basically thought i shouldnt be feeling it as much as i was at 80kg so i kept going up, got to 95kg for RPE8 then had to back off as it was feeling like @9. Bit frustrated to be honest that i found 95kg difficult today when 105kg didnt feel as bad last week.