Open AccessOptimisation of assessment of maximal rate of heart rate increase for tracking training-induced changes in endurance exercise performance
Author(s) -
Maximillian J. Nelson,
Clint R. Bellenger,
Rebecca L. Thomson,
Eileen Y. Robertson,
Kade Davison,
Daniela Schäfer Olstad,
Jonathan D. Buckley
Publication year - 2020
Publication title -
scientific reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.24
H-Index - 213
ISSN - 2045-2322
DOI - 10.1038/s41598-020-59369-6
Subject(s) - heart rate , endurance training , medicine , treadmill , time trial , steady state (chemistry) , zoology , cardiology , chemistry , biology , blood pressure
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.