Immediate effect of whole body vibration on trunk proprioception in non-specific chronic low back pain

Introduction: The available data indicate that there is a relationship between proprioception deficit and low back pain. For this reason, proprioception exercises are usually part of the rehabilitation protocols for these patients. Previous studies revealed that whole body vibration (WBV) can improve muscle performance and proprioception. The aim of this study was to investigate effect of WBV on trunk proprioception in non-specific chronic low back pain (NSCLBP). Materials and Methods: In this randomized clinical trial study, 50 patients with NSCLBP were enrolled. They were randomly assigned to the WBV and control groups. Correspondingly, patients in the experimental group received WBV with frequency 20Hz and acceleration 3-17 g for 360 second in 6 repetitions, and patients in the control group were placed on device at the same position and time, with no vibration. Trunk repositioning error in 30%,60% maximal flexion of lumbar region and in neutral position was measured with Dual Digital inclinometer, before intervention and immediately after 20 minutes. Results: By matching the original effect of measurement conditions (p<0.001) and its interactive effect with group (p = 0.008), there was a significant difference between two groups immediately after the intervention (p=0.027). Conclusion: WBV with low frequency can improve trunk proprioception in individual with non-specific chronic low back pain. So, it can be introduced as a novel physical therapy intervention for these patients.