Stretching out my hamstrings helps me more than anything else to relieve lower back pain.
Same here. Cronicles lower back pain for years. I asked a chiropractor why and he had me lock my knees and try to touch my toes. Could not get within a foot of my toes. He said upper hamstring was to short and rotating pelvis back. Told me to stretch them out. 6 months later, no back pain and I can touch my toes.