[Results] The limitation of hip range of motion of the lumbar instability group was significantly greater than
that of the lumbar stability group. Comparisons among four groups at three weeks and six weeks after the start
of hip exercises revealed that the VAS score of each group had significantly decreased. Comparisons among four
groups at three weeks and at six weeks after the start of hip exercises revealed that the KODI score of each group
had significantly decreased. [Conclusion] These findings suggest that the performance of hip exercises by chronic
low-back pain patients with lumbar instability is more effective than conventional therapy at reducing low-back
pain and levels of disability