The purposes of this study were to 1) compare the drop landing mechanics between individuals with and without a history of concussion and 2) investigate the effects of a mental fatigue intervention on drop landing outcomes among individuals with a history of concussion. It was hypothesized that individuals with a history of concussion would have greater peak vertical ground reaction force, greater peak vertical loading rate, lesser peak knee flexion angle, greater peak knee abduction angle, and greater peak external knee abduction moment compared to 1) individuals without a history of concussion and 2) following a mental fatigue intervention compared to a control intervention. Fifty, 25 per group, recreationally active individuals were matched on age (± 3 years), sex, and body mass index (± 1 kg/m2). Participants completed 3 drop landings before and after the experimental (Stroop) and control (magazine) interventions. 1) A one-way multivariate analysis of variance to compared drop landing biomechanics between groups; there were no differences between groups on drop landing outcomes. This may be due to the lack of a dual task, or the resolution of movement mechanic deficits during a drop landing. 2) A 2 (intervention) × 2 (time) repeated measures multivariate analysis of variance was used to assess individuals with a history of concussion drop landing outcomes. There was no significant interaction, or main effect, of time and intervention. Mental fatigue was successfully induced, the Stroop task may not have manipulated the proper neurocognitive domains to influence the drop landing.
|Advisor:||Pamukoff, Derek N.|
|Commitee:||Wilson, Kathleen S., Kasamatsu, Tricia M.|
|School:||California State University, Fullerton|
|School Location:||United States -- California|
|Source:||MAI 81/12(E), Masters Abstracts International|
|Keywords:||Concussion, Drop landing, Mental fatigue, Neurocognitive|
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