Immediate Effects of Trunk Stabilizer Muscles Training on Muscle Response Time in Individuals with Non-Specific Chronic Low Back Pain
Poramet Earde MSc*,**, Mantana Vongsirinavarat PhD*, Prasert Sakulsriprasert PhD*, Roongtiwa Vachalathiti PhD*
Affiliation : * Faculty of Physical Therapy, Mahidol University, Nakhon Pathom, Thailand ** Department of Physical Therapy, Faculty of Allied Health Sciences, Thammasat University, Pathumthani, Thailand
Objective : To investigate immediate effects of biofeedback training on motor control performance in participants with non-
specific chronic low back pain.
Material and Method: RCT was conducted. The training group received isolated and co-contraction training of trunk
stabilizers in lying on the left side, sitting on stool and sitting on a gymnastic ball, while the control group was asked to rest
comfortably on a chair. Trunk muscles response time during rapid arm movement test was recorded using surface elec-
tromyography. Two-way ANOVA and Bonferroni post hoc test were used to detect changes within and between groups.
Results : In the training group, the trunk muscles response times were significantly decreased after training when compared
with those in the control group (p<0.05).
Conclusion : Trunk stabilizer training has a beneficial effect on motor response time of the trunk muscles. The long-term
effects of exercise should be further considered with a larger sample size.
Keywords : Back pain, Biofeedback, Motor control, EMG, Exercise
