Kyle B Kosik1, Nathan F Johnson2, Masafumi Terada3, Abbey C Thomas4, Carl G Mattacola5, Phillip A Gribble6. 1. Department of Athletic Training & Clinical Nutrition, University of Kentucky, Lexington, KY, 40536, USA. Electronic address: kyle.kosik@uky.edu. 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. 6. Department of Athletic Training & Clinical Nutrition, University of Kentucky, Lexington, KY, 40536, USA.
Abstract
OBJECTIVES: To compare ankle, knee and hip isometric peak torque between young and middle-aged adults with CAI, copers and un-injured controls. DESIGN: Cross-sectional. SETTING: Research Laboratory. PARTICIPANTS: One hundred fifty-six young and middle-aged adults with or without CAI volunteered. MAIN OUTCOME MEASURES: A 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. RESULTS: A 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). CONCLUSIONS: Regardless 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.
OBJECTIVES: To compare ankle, knee and hip isometric peak torque between young and middle-aged adults with CAI, copers and un-injured controls. DESIGN: Cross-sectional. SETTING: Research Laboratory. PARTICIPANTS: One hundred fifty-six young and middle-aged adults with or without CAI volunteered. MAIN OUTCOME MEASURES: A 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. RESULTS: A 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). CONCLUSIONS: Regardless 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.