Decreased ankle and hip isometric peak torque in young and middle-aged adults with chronic ankle instability |
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| Affiliation: | 1. Department of Athletic Training & Clinical Nutrition, University of Kentucky, Lexington, KY, 40536, USA;2. Department of Physical Therapy, University of Kentucky, Lexington, KY, 40536, USA;3. Department of Sport and Health Science, Ritsumeikan University, Kyoto, Japan;4. Department of Kinesiology, The University of North Carolina at Charlotte, Charlotte, NC, 28223, USA;5. College of Health and Human Services, The University of North Carolina At Greensboro, Greensboro, NC, 27402, USA;1. University of Kentucky, 900 South Limestone Street, Lexington, KY 40536-0200, United States;2. Kent State University, MAC Center, P.O. Box 5190, Kent, OH 44242, United States;3. University of North Carolina at Charlotte, 9201 University City Blvd, Charlotte, NC 28223-0001, United States;4. University of North Carolina at Chapel Hill, 26D Fetzer Hall, Chapel Hill, NC 25599, United States;5. University of Sydney, 75 East St Lidcombe, NSW 2141, Australia;6. University of Toledo, 2801 W Bancroft Street, Toledo, OH 43606, United States;1. Department of Physical Education, Yonsei University, Seoul, Republic of Korea;2. International Olympic Committee Research Centre KOREA, Seoul, Republic of Korea;3. Institute of Convergence Science, Yonsei University, Seoul, Republic of Korea;4. Department of Clinical Research on Rehabilitation, National Rehabilitation Center, Seoul, Republic of Korea;1. University of Kentucky, Lexington, KY, United States;2. Ritsumeikan University, Kusatsu, Shiga-ken, Japan;3. Old Dominion University, Norfolk, VA, United States;4. University of North Carolina at Charlotte, Charlotte, NC, United States;1. School of Science and Health, Western Sydney University, Australia;2. Faculty of Health Sciences, The University of Sydney, Australia;1. Graduate School of Health Sciences, Hokkaido University, West-5, North-12, Kita-ku, Sapporo 060-0812, Japan;2. Rehabilitation Center, NTT East Japan Sapporo Hospital, West-15, South-1, Chuo-ku, Sapporo 060-0061, Japan;3. Department of Rehabilitation Science, Faculty of Health Sciences, Hokkaido University, West-5, North-12, Kita-ku, Sapporo 060-0812, Japan;4. Hokuto Endowed Chair in Prevention of Joint Disease, Faculty of Health Sciences, Hokkaido University, West-5, North-12, Kita-ku, Sapporo 060-0812, Japan;5. Department of Rehabilitation, Hokushin Orthopedic Hospital, 3-1-18, Kikusui Motomachi 3 jo, Shiroishi-ku, Sapporo 003-0823, Japan;6. Department of Orthopedic Surgery, Hokuto Hospital, 7-5, Inada-cho Kisen, Obihiro 080-0833, Japan |
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| Abstract: | ObjectivesTo compare ankle, knee and hip isometric peak torque between young and middle-aged adults with CAI, copers and un-injured controls.DesignCross-sectional.SettingResearch Laboratory.ParticipantsOne hundred fifty-six young and middle-aged adults with or without CAI volunteered.Main outcome measuresA handheld dynamometer measured isometric dorsiflexion, plantarflexion, knee extension, hip extension and hip abduction peak force during a 5 s trial. Average peak torque was calculated and normalized to body mass.ResultsA significant Age by Injury interaction for dorsiflexion suggest middle-aged un-injured controls (p < 0.001) and copers (p < 0.001) had lower isometric peak torque compared to their young adult counterparts, but there were no differences between young and middle-aged adults with CAI (p > 0.05). Significant Injury main effects suggest the CAI group had decreased plantarflexion (p = 0.004) and hip extension (p = 0.010) strength compared to un-injured controls, but not copers (p > 0.05). Significant Age main effects for all primary outcome measures were observed, indicating peak torque decreased with age (p < 0.05).ConclusionsRegardless of age, isometric ankle and hip peak torque was lower in participants with CAI compared to un-injured controls, but not copers. These findings provide further evidence towards the impact of CAI in both young and middle-aged adults. |
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| Keywords: | Strength Lower extremity Handheld dynamometer |
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