Measurement and evaluation of dynamic postural steadiness on visual condition between subjects with and without recurrent lbp during upright one leg standing.

Although subjects with recurrent low back pain (LBP) demonstrate altered trunk control, the kinematic and kinetic responses of the trunk have not been carefully investigated. This study was conducted to compare the standing time, spine range of motion, and dynamic postural steadiness index based on visual condition between subjects with and without recurrent LBP during upright one leg standing. The LBP group demonstrated positive correlations with the kinetic indices, enhancing dynamic postural steadiness in the eyes-closed condition to avoid pain or further injury. This dynamic postural steadiness strategy is necessary to improve kinetic and kinematic chain reactions in the LBP group. Additionally, compensatory patterns support the development of optimal postural correction strategies, which might represent a chain reaction to protect trunk control without visual input.