Comparison of Kinematic Movement Patterns Between 2 Subgroups of Females With Low Back Pain and Healthy Women During Sit-to-Stand and Stand-to-Sit.

The purpose of study was to compare the kinematic patterns of the thoracic, lumbar, and pelvis segments and hip joints between 2 low back pain subgroups and healthy women during sit-to-stand and stand-to-sit. Kinematic data of 44 healthy women and 2 subgroups of females with low back pain in 2 subgroups of movement system impairment model (rotation-extension [Rot.Ext] and rotation-flexion [Rot.Flex]) were recorded. Participants performed sit-to-stand and stand-to-sit at a preferred speed. Each task was divided into a pre buttock lifted off/on (pre-BO_ff/n) phase and a post-BO_ff/n phase. The Rot.Ext subgroup showed greater range of motion in the thoracic during pre-BO_ff phase of sit-to-stand (P <.001) and pre-BO_n phase of stand-to-sit (P =.01) compared to the other 2 groups. The Rot.Flex subgroup displayed limited left hip joint excursion during sit-to-stand pre-BO_ff (P =.04) and stand-to-sit post-BO_n phases (P =.02). The Rot.Flex subgroup showed greater pelvis tilt excursion during sit-to-stand post-BO_ff (P =.04) and stand-to-sit pre-BO_n (P =.01) and post-BO_n phases (P =.01). In subgroups of women with chronic low back pain, there were kinematic changes in adjacent body segments/joints of lumbar spine during sit-to-stand and stand-to-sit tasks. [ABSTRACT FROM AUTHOR]