Early 20s - Horse injury, fell off and on to a rock, cracked vertebra, but seemed to heal and no problems till......
40s, a couple minor horse injuries, but started having my back "going out". Would be in intense pain for 1-2 weeks, then ok.
49 - woke up one nite to go to the bathroom, intense shooting pain down my left leg, could not stand, bend, sit, etc. Discetomy took care of that pain.
49-present - recurring LBP, with radiating pain down leg, Dynesys surgery has seemed to help a lot!