Altered preparatory pelvic control during the sit-to-stance-to-sit movement in people with non-specific low back pain |
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| Authors: | Kurt Claeys Wim Dankaerts Lotte Janssens Simon Brumagne |
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| Institution: | 1. Musculoskeletal Research Unit, Department of Rehabilitation Sciences, Faculty of Kinesiology and Rehabilitation Sciences, KU Leuven, Leuven, Belgium;2. Department of Health Care, Catholic University College of Bruges-Ostend, Bruges, Belgium;1. Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, Canada T6G 2R3;2. Department of Physical Therapy, University of Alberta, Edmonton, Canada T6G2G4;3. Syncrude Center, Glenrose Rehabilitation Hospital, Alberta Health Services, 10230 111 Avenue, Edmonton, Canada T5G 0B7;4. Department of Mechanical Engineering, University of Alberta, Edmonton, Alberta, Canada T6G 2R3;1. Department of Kinesiology and Health Promotion, University of Kentucky, Lexington, KY, United States;2. Department of Exercise Science, University of Puget Sound, Tacoma, WA, United States;3. Center for Muscle Biology, University of Kentucky, Lexington, KY, United States;1. Institute of Medicine, Department of Molecular and Clinical Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden;2. Institute of Neuroscience and Physiology, Department of Clinical Neuroscience, Rehabilitation Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden;1. Faculty of Health and Sport Sciences, University of Tsukuba, Tennodai, Tsukuba, Ibaraki, Japan;2. Research Fellow of Japan Society for the Promotion of Science, Kojimachi, Chiyoda, Tokyo, Japan;3. Meiji Yasuda Life Foundation of Health and Welfare Physical Fitness Research Institute, 150 Tobukimachi, Hachioji, Tokyo, Japan |
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| Abstract: | People with non-specific low back pain (LBP) show hampered performance of dynamic tasks such as sit-to-stance-to-sit movement. However, the underlying mechanisms remain obscure. Therefore, the aim of this study was to assess if proprioceptive impairments influence the performance of the sit-to-stance-to-sit movement.First, the proprioceptive steering of 20 healthy subjects and 106 persons with mild LBP was identified during standing using muscle vibration. Second, five sit-to-stance-to-sit repetitions on a stable support and on foam were performed as fast as possible. Total duration, phase duration, center of pressure (COP) displacement, pelvic and thoracic kinematics were analyzed.People with LBP used less lumbar proprioceptive afference for postural control compared to healthy people (P < 0.0001) and needed more time to perform the five repetitions in both postural conditions (P < 0.05). These time differences were determined in the stance and sit phases (transition phases), but not in the focal movement phases. Moreover, later onsets of anterior pelvic rotation initiation were recorded to start both movement sequences (P < 0.05) and to move from sit-to-stance on foam (P < 0.05).Decreased use of lumbar proprioceptive afference in people with LBP seemed to have a negative influence on the sit-to-stance-to-sit performance and more specifically on the transition phases which demand more control (i.e. sit and stance). Furthermore, slower onsets to initiate the pelvis rotation to move from sit-to-stance illustrate a decrease in pelvic preparatory movement in the LBP group. |
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