Knee adduction moments are not increased in obese knee osteoarthritis patients during stair negotiation |
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| Institution: | 1. Department of Orthopaedic Surgery, CAPHRI School for Public Health and Primary Care, Maastricht University Medical Center, P.O. Box 5800, 6202 AZ, Maastricht, the Netherlands;2. Department of Nutrition and Movement Sciences, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, P.O. Box 616, 6200 MD, Maastricht, the Netherlands;1. Graduate Program in Rehabilitation and Functional Performance, Ribeirão Preto Medical School, University of São Paulo, Brazil;2. Biomechanics and Motor Control Laboratory, School of Physical Education and Sport of Ribeirão Preto, University of São Paulo, Brazil;3. Center of Physical Education and Sports, Department of Sports, Federal University of Espírito Santo, Brazil;1. Schoen Clinic Vogtareuth, Gait and Motion Analysis Laboratory, Krankenhausstr. 20, 83569 Vogtareuth, Germany;2. Schoen Clinic Bad Aibling, Department of Neurology, Kolbermoorerstr. 72, 83043 Bad Aibling, Germany;3. German Center for Vertigo and Balance Disorders, Ludwig-Maximilians-University of Munich, Marchioninistr. 15, 81377 Munich, Germany;1. São Paulo State University (UNESP), Human Movement Research Laboratory (MOVI-LAB), Graduate Program in Movement Science, Department of Physical Education, Bauru, SP, Brazil;2. São Paulo State University (UNESP), Laboratory of Information, Vision and Action (LIVIA), Graduate Program in Movement Science, Department of Physical Education, Bauru, SP, Brazil;3. Department of Health and Kinesiology, Purdue University, West Lafayette, IN, USA;1. Department of Orthopaedics, University Hospital RWTH Aachen, Aachen, Germany;2. Department of Diagnostic and Interventional Radiology, University Hospital RWTH Aachen, Aachen, Germany;1. Department of Health and Kinesiology, Purdue University, West Lafayette, IN, USA;2. Human Movement Research Laboratory (MOVI-LAB), Department of Physical Education, São Paulo State University (UNESP), Bauru, São Paulo, Brazil |
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| Abstract: | BackgroundNegotiating stairs is an important activity of daily living that is also associated with large loads on the knee joint. In medial compartment knee osteoarthritis, the knee adduction moment during level walking is considered a marker for disease severity. It could be argued that the discriminative capability of this parameter is even better if tested in a strenuous stair negotiation task.Research questionWhat is the relation with knee osteoarthritis on the knee adduction moment during the stance phase of both stair ascent and descent in patients with and without obesity?MethodsThis case control study included 22 lean controls, 16 lean knee osteoarthritis patients, and 14 obese knee osteoarthritis patients. All subjects ascended and descended a two-step staircase at a self-selected, comfortable speed. Three-dimensional motion analysis was performed to evaluate the knee adduction moment during stair negotiation.ResultsObese knee osteoarthritis patients show a prolonged stance time together with a more flattened knee adduction moment curve during stair ascent. Normalized knee adduction moment impulse, as well as the first and second peaks were not different between groups. During stair descent, a similar increase in stance time was found for both osteoarthritis groups.SignificanceThe absence of a significant effect of groups on the normalized knee adduction moment during stair negotiation may be explained by a lower ambulatory speed in the obese knee osteoarthritis group, that effectively lowers vertical ground reaction force. Decreasing ambulatory speed may be an effective strategy to lower knee adduction moment during stair negotiation. |
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| Keywords: | Obesity Knee osteoarthritis Stair negotiation Knee adduction moment Biomechanics |
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