Almost everybody has some type of back problem. The spine is a very complex structure and is quite easy to get out of wack. When it does get misaligned, it will most likely continue to get out of line in a degenerative manner. I have had terrible back problems and nothing has ever worked except physical therapy. Your body structure is maintained by your spine and your arms and legs pull on it if you have biomechanical deficiencies in other parts of your body. The legs often pull on the lower back if your tendons are tight, I would suggest working out any muscles that are pulling on your spine, the hamstrings are often to blame, also your spine's muscles especially erector spinae which hold your vertebrae in place. Physical therapy can be strenuous, but believe me it should help since increasing muscle mass and flexibility of muscles pulling on your spine will have the effect of increasing blood flow and bone mass to your vertebrae.