3.14 Examining 24-hour heart rate variability during the acute and sub-acute phases of recovery following concussion

Le résumé fourni par la source

Objective 1) Measure 24-hour heart rate variability (HRV) following sport-related concussion (SRC) and compare perturbations to athletes with musculoskeletal (MSK) injuries and healthy (CTL) athletes. 2) Examine the relationship between HRV measures and clinical symptoms post-injury. Design Prospective observational cohort study. Setting University. Participants 195 Canadian interuniversity athletes enrolled in the study and 147 athletes were included in the study – (CTL n=59 [female n=32, male n=27], SRC n=55 [female n=28, male n=27], MSK n=33 [female n=15, male n=19]). Interventions (or Assessment of Risk Factors) Symptom evaluation and 24-hour HRV recording were captured for CTL athletes at baseline, while SRC and MSK injury athletes completed the assessment at two timepoints: within 7 days of injury and at 1-month post-injury. Independent variables: presence or absence of SRC or MSK injury. Outcome Measures Dependent variables: HRV measures (mean and quantiles of RR vector, RMSSD, VLF, LF and HF power and LF/HF ratio) and clinical symptoms. Main Results No significant between-group differences were observed at both time points. Within-group analyses revealed SRC athletes displayed significantly lower values of HRV measures at 1-month post-injury when compared to the acute time point. Additionally, for the SRC group, there were significant correlations between all four symptom clusters and HRV measures: somatic (p<0.001), cognitive (p<0.001), emotional (p<0.001), and fatigue (p< 0.001), however for the MSK injury group, only the cognitive (p< 0.001) symptom cluster was significant. Conclusions These findings suggest that although there were no significant between-group differences, it appears that the two injury groups had differing HRV changes over clinical recovery.

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