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Kinematic Analysis of Different Spinal and Hip Regions during the Performance of A Sagittal Object-Lifting Task in Asymptomatic Individuals

Raee Saeed Alqhtani*

Background & aims: This study examines if modelling the cephalocaudal regions into four separate regions reveals different kinematic patterns of spinal motion in relation to hip motion when lifting an object (a 5 kg dumbbell) from the ground to an upright position.

Methods: Thirty-two male participants (mean age = 28.2 ± 4.2 years; weight = 74.4 ± 11 kg; height =1.70 ± 0.04 meters) agreed to participate in this study. The cephalocaudal region of the spine was divided into four distinct regions of the spine (Head-Cervical, Thoracic, Upper-Lumbar and Lower-Lumbar) to obtain their range of motions and velocities against the hip region during a sagittal objectlifting task.

Results: There were significant differences in the range of motions between each of the five regions (p<0.001) during an object-lifting task as well as velocities significant differences between number of spinal regions and hip. The hip region produced the most kinematic motion and velocity followed by the Lower-Lumbar and Upper-Lumbar during the functional lifting task. There were significant correlations found between head-cervical and lower-lumbar, head-cervical and hip, thoracic and upper-lumbar, Thoracic and hip, upper-lumbar and lower-lumbar, and Lower-Lumbar and hip during both range of motion and velocity analysis.

Conclusion: The results of this study demonstrate differences in the contribution of five anatomical regions during a functional lifting task. Hip and Lower-Lumbar and Upper-Lumbar made up the most significant proportion of total kinematic motions and velocity during the functional lifting task.