World Federation of Athletic Training and Therapy World Congress 2022 Peer-Reviewed Track Abstracts, May 5–7, 2022, Winnipeg, Manitoba, Canada

Context: Recent research has highlighted changes in neurocognitive and central nervous system function among some of the most common injuries, particularly in those with chronic ankle instability (CAI). Functional performance tests (FPT) like the side-hop test (SHT) are often used to assess physical performance, however, minimally stress a patient's neurocognitive function. On the contrary, dual-tasking is often used to assess the interplay between physical and neurocognitive performance, however, these traditional laboratory tasks are minimally challenging on higher-level athletes. Modifying and adding a reactive component to an already proven FPT may provide clinicians with increased insight into neurocognitive performance. Therefore, the purpose of this study was two-fold, to validate a choice-reaction hop test (CRHT) by assessing differences in timing versus the SHT, and to determine the CRHT's test-retest reliability. We hypothesized that the CRHT would take longer to complete than the SHT and it would demonstrate good test-retest reliability.Methods: Fourteen physically active (>90 minutes of physical activity/week) participants (5 female/9 male, 24.5±3.6 years old, 174.2±9.3 cm, 74.4±16.3 kg) with a range of ankle injury history completed the study. Participants were initially screened and completed injury history questionnaires followed by two hop tests in a randomized order. For the SHT, participants performed 20 hops on a single limb medially and laterally over a 30-cm distance as quickly as possible. For the CRHT participants similarly hopped on an instrumented mat 20 times on a single limb medially and laterally over a 30-cm distance, however, participants had to react to one of two squares on each side randomly indicated by flashing lights on a computer screen. Participants completed 3 trials of each hop test in a counterbalanced order. Participants returned one-week later to repeat the CRHT. To validate the CRHTs neurocognitive component, a paired t-test between the SHT and the CRHT was conducted. 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