Get this back pain only when bending down for a long time. it's right between my butt and lower back. it's a shooting pain that travels. what is this?

Back pain: Mechanical low back pain. Active young people involved in sports can suffer a fracture of the pars interarticularis (pars defect) from a hyperextension injury to the spine. Fortunately, this fracture of the lumbar spine often heals if the person rests, wears a brace, avoids smoking, and refrains from sports and heavy lifting until the back is free of pain. See a spine specialist for treatment.