title: Static and dynamic single leg postural control performance during dual-task paradigms.
abstract: Combining dynamic postural control assessments and cognitive tasks may give clinicians a more accurate indication of postural control under sport-like conditions compared to single-task assessments. We examined postural control, cognitive and squatting performance of healthy individuals during static and dynamic postural control assessments in single- and dual-task paradigms. Thirty participants (female = 22, male = 8; age = 20.8 ± 1.6 years, height = 157.9 ± 13.0 cm, mass = 67.8 ± 20.6 kg) completed single-leg stance and single-leg squat assessments on a force plate individually (single-task) and concurrently (dual-task) with two cognitive assessments, a modified Stroop test and the Brooks Spatial Memory Test. Outcomes included centre of pressure speed, 95% confidence ellipse, squat depth and speed and cognitive test measures (percentage of correct answers and reaction time). Postural control performance varied between postural control assessments and testing paradigms. Participants did not squat as deep and squatted slower (P < 0.001) during dual-task paradigms (≤12.69 ± 3.4 cm squat depth, ≤16.20 ± 4.6 cm · s-1squat speed) compared to single-task paradigms (14.57 ± 3.6 cm squat depth, 19.65 ± 5.5 cm · s-1squat speed). The percentage of correct answers did not change across testing conditions, but Stroop reaction time (725.81 ± 59.2 ms; F2,58= 7.725, P = 0.001) was slowest during single-leg squats compared to baseline (691.64 ± 80.1 ms; P = 0.038) and single-task paradigms (681.33 ± 51.5 ms; P < 0.001). Dynamic dual-task assessments may be more challenging to the postural control system and may better represent postural control performance during dynamic activities.
authors: a Matthew Gfeller Sport-Related Traumatic Brain Injury Research Center, Department of Exercise and Sport Science , University of North Carolina at Chapel Hill , Chapel Hill , NC , USA.|b Sports Medicine Research Laboratory, Department of Exercise and Sport Science , University of North Carolina at Chapel Hill , Chapel Hill , NC , USA.
authors: Maria K
authors: MK
authors: Talarico
authors: a Matthew Gfeller Sport-Related Traumatic Brain Injury Research Center, Department of Exercise and Sport Science , University of North Carolina at Chapel Hill , Chapel Hill , NC , USA.|c Curriculum in Human Movement Science, Department of Allied Health Sciences , University of North Carolina at Chapel Hill , Chapel Hill , NC , USA.
authors: Robert C
authors: RC
authors: Lynall
authors: b Sports Medicine Research Laboratory, Department of Exercise and Sport Science , University of North Carolina at Chapel Hill , Chapel Hill , NC , USA.|c Curriculum in Human Movement Science, Department of Allied Health Sciences , University of North Carolina at Chapel Hill , Chapel Hill , NC , USA.
authors: Timothy C
authors: TC
authors: Mauntel
authors: c Curriculum in Human Movement Science, Department of Allied Health Sciences , University of North Carolina at Chapel Hill , Chapel Hill , NC , USA.|d Department of Orthopaedics , University of North Carolina at Chapel Hill , Chapel Hill , NC , USA.
authors: Paul S
authors: PS
authors: Weinhold
authors: b Sports Medicine Research Laboratory, Department of Exercise and Sport Science , University of North Carolina at Chapel Hill , Chapel Hill , NC , USA.|c Curriculum in Human Movement Science, Department of Allied Health Sciences , University of North Carolina at Chapel Hill , Chapel Hill , NC , USA.
authors: Darin A
authors: DA
authors: Padua
authors: a Matthew Gfeller Sport-Related Traumatic Brain Injury Research Center, Department of Exercise and Sport Science , University of North Carolina at Chapel Hill , Chapel Hill , NC , USA.|c Curriculum in Human Movement Science, Department of Allied Health Sciences , University of North Carolina at Chapel Hill , Chapel Hill , NC , USA.
authors: Jason P
authors: JP
authors: Mihalik
mesh_terms: D003071:Cognition / Q000502:physiology*; D003430:Cross-Sectional Studies; D005080:Exercise Test; D005260:Female; D006801:Humans; D007866:Leg / Q000502:physiology*; D008297:Male; D008568:Memory / Q000502:physiology; D009483:Neuropsychological Tests; D004856:Postural Balance / Q000502:physiology*; D011930:Reaction Time; D057190:Stroop Test; D013647:Task Performance and Analysis; D055815:Young Adult
keywords: Reaction time; Stroop test; functional assessments