Joint coordination during whole-body lifting in @entity1 with XXXX after pregnancy.

@entity1 @entity1643 @entity572 @entity158
OBJECTIVE: To quantify differences in the kinematics of lifting between @entity1 with @entity1643 after pregnancy and @entity1 without. DESIGN: Comparison study. SETTING: Research laboratory. @entity1 : Volunteer sample of 7 @entity1 with @entity158 (positive @entity158 drawing, no physical examination) and 9 female controls (not matched). INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Duration of downward and upward phases, relative instant of box lift-off, joint angles, spatial angles of trunk and pelvis, pelvic angle relative to trunk, and phase angle relationships between joints. RESULTS: The duration of the upward phase +/- standard deviation was longer in the @entity158 group (1731+/-290 ms vs 1489+/-187 ms, P=.031). At box lift-off, this group had less @entity572 (101.9 degrees +/-20.8 degrees vs 78.7 degrees +/-12.4 degrees, P=.015) but more backward pelvis tilt relative to the trunk, that is, more lumbar spine flexion (126.3 degrees +/-16.8 degrees vs 109.0 degrees +/-12.3 degrees, P=.031). The @entity158 group showed an immediate transition from lumbar spine flexion to extension, whereas the controls maintained peak flexion for about 600 ms. The peak phase lag between knee and hip joint extension in the upward phase was larger for the @entity158 group (-29.7 degrees +/-8.3 degrees vs -17.2 degrees +/-5.5 degrees, P=.003). CONCLUSION: @entity1 with @entity1643 after pregnancy showed different kinematics of lifting. Further research is needed to determine the exact relationship between the altered kinematics and the underlying disorder.
