DOES SYMMETRY OF LOWER LIMB KINETICS EXIST IN SITTING AND STANDING TASKS?

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This study compared sit-to-stand and stand-to-sit symmetry for total hip arthroplasty patients (n=40) and a control group (n=19). 3D kinematics and kinetics were recorded. A symmetry index was calculated for kinetics. T-tests were significant for hip and knee moments and powers, and extension sum of moments for sit-to-stand, and for hip extension moment and power for stand-to-sit. THA patients mainly rely on their nonoperated limb to perform the sit-to-stand task. There was less asymmetry during the stand-to-sit tasks, were found significant. This study underlines the presence of asymmetrical kinetics in THA patient for these tasks, and demonstrated that sit-to-stand is more sensitive to asymmetry. These results should be considered in rehabilitation programs, and consequently allow these patients to return to a more active lifestyle.