Last week I started PPL month 3. I have lower back issues and have been hesitant to do any exercises that involve my lower back. I figured I can't keep ignoring them so I decided to do them starting with this routine. I did the pendlay row last week with low weight just to get started and it went fine. I increased the weight this week by only 10lbs and after just a couple of sets I started to feel pain in my lower back so I stopped. I've watched Scott's form videos so I don't think form was an issue. I don't want to risk any furthur issues so I'm not going to do this exercise anymore. Is there anything I can replace it with to fit into PPL month 3?