ages ago as a 16 ? year old i was playing tennis , every day, way too long with some friends and one day i was running hard for a ball and then something broke in the lower back. i think we were doing much more exercise than the body could take back then. it must be a fairly common injury. from then on even just bending over to do a few dishes put me in a 'vulnerable' position, or carrying stuff also made me vulnerable. i've had it forever. any idea what the name could be? it must be fairly common so someone might know. problems later would be with lifting stuff and carrying stuff that other youth/people wouldn't have an issue with. years later i'd fix this by getting flexible (can touch toes) and learning how to move heavy objects safely and i'm doing quite well now. but it's still there and i'm curious what the name of the condition is. that way i can research it and see how it might effect me with exercises like the deadlift. i've been doing these (light weight) on the back yard during lock down with homemade concrete weights (can't buy it). they're fun when you know how to do them safely.