I switched back to strength training after years of regular training. I have had low back pain/spasms in the past, so I have avoided deadlifts and squats by substituting rack pulls and smith machine squats. I'm sure these exercises have weakened my lower back. Been doing a 5 x 5 for the last 5 weeks, I really like the workout, however, I have had to take extra days off. I purchased an Inzer belt last week and felt that it was extremely helpful. My most recent session went well, but since, I feel even more pain in my low back, feels very stiff, what I am assuming are spasms. What can I do to try to rectify this before I must see a doctor. I really hate to have to quit this training. Any suggestions are welcome. Thanks.