Effect of ramp slope on intensity thresholds based on correlation properties of heart rate variability during cycling.

ABSTRACT: An index of heart rate variability (HRV), detrended fluctuation analysis (DFA a1) has gathered interest as a surrogate marker of exercise intensity boundaries. The aim of this report was to examine heart rate variability threshold (HRVT) behavior across different ramp incremental (RI) slopes. Seventeen participants completed a series of three RI (15, 30, and 45 W · min^-1 slopes) with monitoring of gas exchange parameters, heart rate (HR) and HRV. HRVT1 was defined as the V̇O₂ or HR at which DFA a1 reached 0.75 and the HRVT2 at which these values reached 0.5. HRVTs were compared by Pearson's r, Bland-Altman analysis, ICC_3,1 , ANOVA, and paired t-testing. An excellent degree of reliability was seen across all three ramps, with an ICC_3,1 of 0.93 and

SUBMITTER: Fleitas-Paniagua PR 

PROVIDER: S-EPMC10406567 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature