Subjective History:
Symptoms can start gradually and some may not be aware they have spondylolisthesis at all as it can be asymptomatic, especially if its grade I. Grade II and above slips can present as low back pain with or without leg symptoms. The back pain will often be aggravated by extension activities.
Objective Examination:
Symptoms worsened by extension
There may be a palpable dip at the level of the slip and associated soft tissue abnormalities
Tight hamstrings
References
Image from OpenI – Licensed by CC