[brador]

Stop ignoring obesity.

Pull up the BMI chart, do the calculation. Get to normal at 1kg drop a week. Done. It works. Back pain solved.

[_pdp_]

Solid advise but I think that it is less known that tight glutes can cause lower back pain too even when your BMI is normal. Basically sitting too much and not stretching enough is a cause for the pelvic misalignment.