Please use this identifier to cite or link to this item:
|Scopus||Web of Science®||Altmetric|
|Title:||Contextualizing parasympathetic hyperactivity in functionally overreached athletes with perceptions of training tolerance|
|Citation:||International Journal of Sports Physiology and Performance, 2016; 11(5):685-692|
|Publisher:||Human Kinetics Publishers|
|Clint R. Bellenger, Laura Karavirta, Rebecca L. Thomson, Eileen Y. Robertson, Kade Davison, Jonathan D. Buckley|
|Abstract:||Purpose: Heart-rate variability (HRV) as a measure of autonomic function may increase in response to training interventions leading to increases or decreases in performance, making HRV interpretation difficult in isolation. This study aimed to contextualize changes in HRV with subjective measures of training tolerance. Methods: Supine and standing measures of vagally mediated HRV (root-mean-square difference of successive normal RR intervals [RMSSD]) and measures of training tolerance (Daily Analysis of Life Demands for Athletes questionnaire, perception of energy levels, fatigue, and muscle soreness) were recorded daily during 1 wk of light training (LT), 2 wk of heavy training (HT), and 10 d of tapering (T) in 15 male runners/triathletes. HRV and training tolerance were analyzed as rolling 7-d averages at LT, HT, and T. Performance was assessed after LT, HT, and T with a 5-km treadmill time trial (5TTT). Results: Time to complete the 5TTT likely increased after HT (effect size [ES] ± 90% confidence interval = 0.16 ± 0.06) and then almost certainly decreased after T (ES = −0.34 ± 0.08). Training tolerance worsened after HT (ES ≥ 1.30 ± 0.41) and improved after T (ES ≥ 1.27 ± 0.49). Standing RMSSD very likely increased after HT (ES = 0.62 ± 0.26) and likely remained higher than LT at the completion of T (ES = 0.38 ± 0.21). Changes in supine RMSSD were possible or likely trivial. Conclusion: Vagally mediated HRV during standing increased in response to functional overreaching (indicating potential parasympathetic hyperactivity) and also to improvements in performance. Thus, additional measures such as training tolerance are required to interpret changes in vagally mediated HRV.|
|Keywords:||Athletic performance; autonomic nervous system; cardiac regulation|
|Rights:||Copyright status unknown|
|Appears in Collections:||Aurora harvest 3|
Obstetrics and Gynaecology publications
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.