Dancers and gymnasts with high spinal mobility are prone to spondylolysis and spondylolisthesis due to stress strain reversals during extension.

“now if I said to you who among your patients gets fondal is thesis the broken pars bone that holds the facet joint joint on basically you are going to say well dancers gymnasts the very people that had the mechanical advantage to twist now when they go into extension their facet joints are like shingles on a roof they bend the pars bone creating stress strain reversals and eventually that bone will uh get a stress fracture or a stress”

“now when they go into extension their facet joints are like shingles on a roof they bend the bars bone creating stress strain reversals and eventually that bone will uh get a stress fracture or a stress reaction and if they keep going fullblown spond all this thesis”