The effect of six weeks endurance training on dynamic muscular control of the knee following fatiguing exercise |
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| Affiliation: | 1. Center for Sensory-Motor Interaction, Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Denmark;2. Department of Neurorehabilitation Engineering, Bernstein Focus Neurotechnology (BFNT) Göttingen, Bernstein Center for Computational Neuroscience, Georg-August University of Göttingen, Göttingen, Germany;3. Pain Clinic, Center for Anesthesiology, Emergency and Intensive Care Medicine, University Hospital Göttingen, Göttingen, Germany;1. Mathematics Department, Sivanath Sastri College, 23/49 Gariahat Road, Kolkata 700029, India;2. Mathematics Department, Calcutta Institute of Engineering and Management, 24/1A Chandi Ghosh Road, Kolkata 700040, India;3. Rabindra Bharati University, Kolkata 700050, India;1. Department of Pathology and Anatomical Sciences, Faculty of Medicine and Dentistry, Ageing Research Institute, University of Murcia, Murcia, Spain;2. Oral Medicine Ageing Research Institute, Faculty of Medicine and Dentistry, University of Murcia, Murcia, Spain;3. I+D+I Nutrafur SA Murcia Spain Ageing Research Institute, University of Murcia, Murcia, Spain;1. Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Street, Unit 1473, Houston, TX, 77030, United States;2. Department of Biostatistics, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Street, Unit 1411, Houston, TX, 77030, United States;3. Department of Pathology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Street, Unit 0085, Houston, TX, 77030, United States;4. Division of Pediatrics, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Street, Unit 0087, Houston, TX, 77030, United States;5. Department of Orthopedic Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Street, Unit 1448, Houston, TX, 77030, United States;6. Pelvic Sarcoma Center of Excellence, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Street, Unit 1448, Houston, TX, 77030, United States;1. School of Medicine, Louisiana State University Health Sciences Center, Shreveport, Louisiana;2. Department of Radiology, Louisiana State University Health Sciences Center, Shreveport, Louisiana;3. Animation and Visual Effects Program, Louisiana State University, Shreveport, Louisiana;4. PET Imaging Center, Biomedical Research Foundation of Northwest Louisiana, Shreveport, Louisiana;1. Trauma and Orthopaedic Research Unit, Canberra Hospital, Woden, ACT 2606, Australia;2. Medical School, The Australian National University, Canberra, ACT 0200, Australia;3. National Institute of Sports Studies, University of Canberra, Bruce, ACT 2614, Australia;4. Head of Physiotherapy Discipline, Faculty of Health, University of Canberra, Bruce, ACT 2614, Australia;5. Port Adelaide Football Club, Allan Scott Power Headquarters, Brougham Place, Alberton, SA 5014, Australia |
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| Abstract: | The aim of the study was to examine whether six weeks of endurance training minimizes the effects of fatigue on postural control during dynamic postural perturbations. Eighteen healthy volunteers were assigned to either a 6-week progressive endurance training program on a cycle ergometer or a control group. At week 0 and 7, dynamic exercise was performed on an ergometer until exhaustion and immediately after, the anterior–posterior centre of pressure (COP) sway was analyzed during full body perturbations. Maximal voluntary contractions (MVC) of the knee flexors and extensors, muscle fiber conduction velocity (MFCV) of the vastus lateralis and medialis during sustained isometric knee extension contractions, and power output were measured. Following the training protocol, maximum knee extensor and flexor force and power output increased significantly for the training group with no changes observed for the control group. Moreover, the reduction of MFCV due to fatigue changed for the training group only (from 8.6% to 3.4%). At baseline, the fatiguing exercise induced an increase in the centre of pressure sway during the perturbations in both groups (>10%). The fatiguing protocol also impaired postural control in the control group when measured at week 7. However, for the training group, sway was not altered after the fatiguing exercise when assessed at week 7. In summary, six weeks of endurance training delayed the onset of muscle fatigue and improved the ability to control balance in response to postural perturbations in the presence of muscle fatigue. Results implicate that endurance training should be included in any injury prevention program. |
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| Keywords: | Endurance training Centre of pressure Muscle fatigue |
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