OBJECTIVE: To evaluate if @entity1643 @entity1 perform manual material handling tasks differently from control subjects. DESIGN: Comparative study using a repeated measures design. BACKGROUND: No study evaluated the lifting technique of back @entity158 @entity1 relative to control subjects during free style lifting and lowering tasks. Previous findings suggest that lowering would be more hazardous than lifting to the low back. It would be interesting to evaluate if @entity1643 @entity1 behave differently than controls when lifting and lowering. METHODS: Thirty-three male subjects (18 controls, 15 suffering from non-specific @entity1643 ) participated. A 12-kg box was lifted (freestyle) from the floor to the hips (1) in front (symmetric task) or (2) to a shelf located at 90 degree on the right (asymmetric task) and was lowered back to the floor. A 3D biomechanical analysis involving the assessment of L5/S1 loading, posture of segments, inertial parameters, and EMG was performed. RESULTS: There was no difference between the groups for postural (trunk and lower limb angles), inertial (trunk velocity and acceleration), and L5/S1 loading (moments and compression) variables. The @entity1 showed abnormally low left lumbar erector spinae (symmetric task, lowering) or high left thoracic erector spinae (all tasks) EMG activation. Significant Group x Action (lifting vs. lowering) interactions were also observed for some inertial and L5/S1 loading variables suggesting that the biomechanical differences detected between lifting and lowering may have a differential influence on the technique used by back @entity158 @entity1 and control subjects. CONCLUSIONS: The gross lifting technique of back @entity158 @entity1 was unaltered relative to controls but the activation of paraspinal muscles differed, suggesting that a more detailed biomechanical analysis, such as the use of EMG driven models, might be required to reveal @entity73 during lifting. RELEVANCE: To evaluate if @entity1643 @entity1 use naturally different lifting techniques to prevent @entity158 exacerbation and damaged lumbar tissue overloading.

A biomechanical comparison of lifting techniques between subjects with and without XXXX during freestyle lifting and lowering tasks.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity73 :: ('MESH:D003072', 'Disease') :: ['lumbar impairments'] @entity1643 :: ('MESH:D017116', 'Disease') :: ['chronic low back pain'] @entity158 :: ('MESH:D010146', 'Disease') :: ['pain']
@entity1643 :: (MESH:D017116,Disease) :: ['chronic low back pain']
