Introduction:
To evaluate the impact of adding hip strength exercises to lumbar stabilizing exercises on pain, disability, and spatio-temporal parameters of gait in the treatment of non-specific low back pain (NSLBP).

Methods:
In this randomized controlled trial, 60 patients diagnosed with NSLBP were randomized into two equal groups. The subjects were randomly allocated to either group A, the control group (n = 30), performing lumbar stabilizing exercises, or group B, the study group (n = 30), receiving lumbar stabilizing exercises and a progressive hip strengthening exercise program. The frequency of intervention was 3 sessions per week for six weeks. In this trial, the Visual Analogue Scale for pain intensity, Modified Oswestry Disability Index for disability, and Kinovea 2D motion analysis for spatio-temporal parameters were evaluated pre-treatment and after six weeks.

Results:
There were statistically significant differences between groups in changes in pain scores (p = 0.035), the disability index (p = 0.012), and COG vertical displacement (p = 0.017). There were no statistically significant differences in stride length, stride time, stride speed, or cadence between the control and study groups (p > 0.005).

Conclusions:
Adding hip strengthening exercises to a lumbar stabilization exercise program can reduce pain and disability and decrease COG vertical displacement more than a lumbar stabilization exercise program alone in NSLBP patients. However, no differences were found in gait speed, cadence, stride length, and stride time.