Strengthening the abs, stretching the hams and hip flexors should help. I strained my lower back badly (L4-L5 sprain) many years ago and went to rehab/therapy and laid off from weights. What helped really well in the therapy were the Williams flexion exercises. Just be patient with them though, coz they seem so light and easy.
Early this year, I hurt my back (not as bad though) and did the same exercises at home. Pain was gone after a week.
Early this year, I hurt my back (not as bad though) and did the same exercises at home. Pain was gone after a week.