Is your back sore after deadlifts?
Any number of things can cause back pain with deadlifts. In the time I have spent at 12 Labours CrossFit, I've found some similarities between the athletes.
The biggest issue I've found is: low hamstring mobility relative to high low-back mobility during deadlifts.
We're going to look at a couple tests you can do on yourself to see if this applies to you. I'll break down some techniques to help you fix this lift in the short and long term.