Some studies reported significant clinical improvements in patients with SLDD after manipulation in comparison to traction , heat  and sham manipulation , but no significant differences when compared to exercise therapy and medical corsets . A recent study found long-term improvement in pain and functional activity after 1 year of follow-up , and another study in 2016 reported significant improvement in leg pain after 1 month in patients with extrusion and sequestration of lumbar discs, following manipulation .