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标题：Optimisation of assessment of maximal rate of heart rate increase for tracking training-induced changes in endurance exercise performance
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作者：Maximillian J. Nelson ; Clint R. Bellenger ; Rebecca L. Thomson 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2020
卷号：10
期号：1
页码：1-6
DOI：10.1038/s41598-020-59369-6
出版社：Springer Nature
摘要：The maximal rate of heart rate (HR) increase (rHRI), a marker of HR acceleration during transition from rest to submaximal exercise, correlates with exercise performance. In this cohort study, whether rHRI tracked performance better when evaluated over shorter time-periods which include a greater proportion of HR acceleration and less steady-state HR was evaluated. rHRI and five-km treadmill running time-trial performance (5TTT) were assessed in 15 runners following one week of light training (LT), two weeks of heavy training (HT) and 10-day taper (T). rHRI was the first derivative maximum of a sigmoidal curve fit to one, two, three and four minutes of R-R data during transition from rest to running at 8 km/h (rHRI 8 km/h ), 10.5 km/h , 13 km/h and transition from 8 to 13 km/h (rHRI 8–13km/h ). 5TTT time increased from LT to HT (effect size [ES] 1.0, p < 0.001) then decreased from HT to T (ES −1.7, p < 0.001). 5TTT time was inversely related to rHRI 8 km/h assessed over two (B = −5.54 , p = 0.04) three (B = −5.34 , p = 0.04) and four (B = −5.37 , p = 0.04) minutes, and rHRI 8–13km/h over one (B = −11.62 , p = 0.006) and three (B = −11.44 , p = 0.03) minutes. 5TTT correlated most consistently with rHRI 8 km/h . rHRI 8 km/h assessed over two to four minutes may be suitable for evaluating athlete responses to training.