Postural stabilization after single-leg vertical jump in individuals with chronic ankle instability |
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| Institution: | 1. Department of Physiotherapy, Health and Sports Sciences Center, Santa Catarina State University, Florianópolis, Brazil;2. Department of Community and Allied Health, La Trobe University, Bendigo, Victoria, Australia;1. School of Health, Physical Education and Recreation, University of Nebraska at Omaha, 6001 Dodge St, HPER 207Y, Omaha, NE, USA;2. Department of Biomechanics, University of Nebraska at Omaha, 6001 Dodge St, Omaha, NE, USA;3. Department of Health and Human Performance, McGill 238D, University of Montana, Missoula, MT 59812, USA;4. Center for Brain, Biology & Behavior, C89 East Stadium, University of Nebraska-Lincoln, Lincoln, NE 68588-0156, USA;1. University of Virginia, Department of Kinesiology, USA;2. University of North Carolina at Charlotte, Department of Kinesiology, USA;3. University of Virginia, Department of Orthopedic Surgery, USA;4. Northern Kentucky University, School of Kinesiology, Counseling & Rehabilitative Sciences, USA;1. Division of Preventive and Sports Medicine, Institute of Occupational, Social and Environmental Medicine, Goethe-University Frankfurt, Germany;2. Division of Sports Medicine and Exercise Physiology, Institute of Sports Sciences, Goethe-University Frankfurt, Germany;1. Sports Medicine Research Institute, Department of Athletic Training & Clinical Nutrition, University of Kentucky, United States;2. MOTION Science Institute, Department of Exercise & Sport Science, University of North Carolina at Chapel Hill, United States;3. Department of Health, Athletic Training, Recreation & Kinesiology, Longwood University, United States;1. Department of Rehabilitation, Nishikawa Orthopaedic Clinic, 1-14-2 Osakidai, Sakura-city, Chiba, 285-0817, Japan;2. Department of Sport Rehabilitation, Hiroshima University, 1-3-2 Kagamiyama, Higashihiroshima-city, Hiroshima, 739-0046, Japan;3. Department of Orthopaedic Surgery, Chiba University, 1-8-1 Inohana, chuoku Chiba-city, Chiba, 260-0856, Japan;4. Nishikawa Orthopaedic Clinic, 1-14-2 Osakidai, Sakura-city, Chiba 285-0817 Japan;1. Faculty of Physical Therapy, Mahidol University, 999 Phuttamonthon 4 Road, Salaya, Nakhon Pathom, 73170, Thailand;2. College of Sport Science and Technology, Mahidol University, 999 Phuttamonthon 4 Road, Salaya, Nakhon Pathom, 73170, Thailand;3. School and Graduate Institute of Physical Therapy, College of Medicine, National Taiwan University, Taipei City, Taiwan Room 319, Floor 3, No.17, Xuzhou Rd, Zhongzheng District, Taipei City, 100, Taiwan, ROC |
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| Abstract: | ObjectivesTo investigate the impact different ways to define reference balance can have when analysing time to stabilization (TTS). Secondarily, to investigate the difference in TTS between people with chronic ankle instability (CAI) and healthy controls.DesignCross-sectional study.SettingLaboratory.ParticipantsFifty recreational athletes (25 CAI, 25 controls).Main outcome measuresTTS of the center of pressure (CoP) after maximal single-leg vertical jump using as reference method the single-leg stance, pre-jump period, and post-jump period; and the CoP variability during the reference methods.ResultsThe post-jump reference period had lower values for TTS in the anterior-posterior (AP) direction when compared to single-leg stance (P = 0.001) and to pre-jump (P = 0.002). For TTS in the medio-lateral (ML) direction, the post-jump reference period showed lower TTS when compared to single-leg stance (P = 0.01). We found no difference between CAI and control group for TTS for any direction. The CAI group showed more CoP variability than control group in the single-leg stance reference period for both directions.ConclusionsDifferent reference periods will produce different results for TTS. There is no difference in TTS after a maximum vertical jump between groups. People with CAI have more CoP variability in both directions during single-leg stance. |
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| Keywords: | Time to stabilization Ankle Balance Kinetics Postural control |
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