Effect of ramp slope on intensity thresholds based on correlation properties of heart rate variability during cycling
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. Sevent...
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Published in | Physiological reports Vol. 11; no. 15; pp. e15782 - n/a |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
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United States
John Wiley & Sons, Inc
01.08.2023
John Wiley and Sons Inc Wiley |
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Online Access | Get full text |
ISSN | 2051-817X 2051-817X |
DOI | 10.14814/phy2.15782 |
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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, ICC3,1, ANOVA, and paired t‐testing. An excellent degree of reliability was seen across all three ramps, with an ICC3,1 of 0.93 and 0.88 for the HRVT1 V̇O2 and HR, respectively, and 0.90 and 0.92 for the HRVT2 V̇O2 and HR, respectively. Correlations between HRVT1/2 of the individual ramps were high with r values 0.84–0.95 for both HR and V̇O2. Bland–Altman differences ranged between −1.4 and 1.2 mL · kg−1 · min−1 and −2 and +2 bpm. Paired t‐testing showed no mean differences between any HRVT1/2 ramp comparisons. Cycling ramp slope does not appear to affect either HRVT1 or HRVT2 in terms of HR or V̇O2. |
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AbstractList | 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
slopes) with monitoring of gas exchange parameters, heart rate (HR) and HRV. HRVT1 was defined as the V̇O
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
, ANOVA, and paired t-testing. An excellent degree of reliability was seen across all three ramps, with an ICC
of 0.93 and 0.88 for the HRVT1 V̇O
and HR, respectively, and 0.90 and 0.92 for the HRVT2 V̇O
and HR, respectively. Correlations between HRVT1/2 of the individual ramps were high with r values 0.84-0.95 for both HR and V̇O
. Bland-Altman differences ranged between -1.4 and 1.2 mL · kg
· min
and -2 and +2 bpm. Paired t-testing showed no mean differences between any HRVT1/2 ramp comparisons. Cycling ramp slope does not appear to affect either HRVT1 or HRVT2 in terms of HR or V̇O
. 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 V̇O 2 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 0.88 for the HRVT1 V̇O 2 and HR, respectively, and 0.90 and 0.92 for the HRVT2 V̇O 2 and HR, respectively. Correlations between HRVT1/2 of the individual ramps were high with r values 0.84–0.95 for both HR and V̇O 2 . Bland–Altman differences ranged between −1.4 and 1.2 mL · kg −1 · min −1 and −2 and +2 bpm. Paired t ‐testing showed no mean differences between any HRVT1/2 ramp comparisons. Cycling ramp slope does not appear to affect either HRVT1 or HRVT2 in terms of HR or V̇O 2 . 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, ICC3,1, ANOVA, and paired t‐testing. An excellent degree of reliability was seen across all three ramps, with an ICC3,1 of 0.93 and 0.88 for the HRVT1 V̇O2 and HR, respectively, and 0.90 and 0.92 for the HRVT2 V̇O2 and HR, respectively. Correlations between HRVT1/2 of the individual ramps were high with r values 0.84–0.95 for both HR and V̇O2. Bland–Altman differences ranged between −1.4 and 1.2 mL · kg−1 · min−1 and −2 and +2 bpm. Paired t‐testing showed no mean differences between any HRVT1/2 ramp comparisons. Cycling ramp slope does not appear to affect either HRVT1 or HRVT2 in terms of HR or V̇O2. 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, ICC3,1, ANOVA, and paired t‐testing. An excellent degree of reliability was seen across all three ramps, with an ICC3,1 of 0.93 and 0.88 for the HRVT1 V̇O2 and HR, respectively, and 0.90 and 0.92 for the HRVT2 V̇O2 and HR, respectively. Correlations between HRVT1/2 of the individual ramps were high with r values 0.84–0.95 for both HR and V̇O2. Bland–Altman differences ranged between −1.4 and 1.2 mL · kg−1 · min−1 and −2 and +2 bpm. Paired t‐testing showed no mean differences between any HRVT1/2 ramp comparisons. Cycling ramp slope does not appear to affect either HRVT1 or HRVT2 in terms of HR or V̇O2. 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, ICC3,1 , ANOVA, and paired t-testing. An excellent degree of reliability was seen across all three ramps, with an ICC3,1 of 0.93 and 0.88 for the HRVT1 V̇O2 and HR, respectively, and 0.90 and 0.92 for the HRVT2 V̇O2 and HR, respectively. Correlations between HRVT1/2 of the individual ramps were high with r values 0.84-0.95 for both HR and V̇O2 . Bland-Altman differences ranged between -1.4 and 1.2 mL · kg-1 · min-1 and -2 and +2 bpm. Paired t-testing showed no mean differences between any HRVT1/2 ramp comparisons. Cycling ramp slope does not appear to affect either HRVT1 or HRVT2 in terms of HR or V̇O2 .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, ICC3,1 , ANOVA, and paired t-testing. An excellent degree of reliability was seen across all three ramps, with an ICC3,1 of 0.93 and 0.88 for the HRVT1 V̇O2 and HR, respectively, and 0.90 and 0.92 for the HRVT2 V̇O2 and HR, respectively. Correlations between HRVT1/2 of the individual ramps were high with r values 0.84-0.95 for both HR and V̇O2 . Bland-Altman differences ranged between -1.4 and 1.2 mL · kg-1 · min-1 and -2 and +2 bpm. Paired t-testing showed no mean differences between any HRVT1/2 ramp comparisons. Cycling ramp slope does not appear to affect either HRVT1 or HRVT2 in terms of HR or V̇O2 . |
Author | Murias, Juan M. Almeida Azevedo, Rafael Fleitas‐Paniagua, Pablo R. Rogers, Bruce Trpcic, Mackenzie |
AuthorAffiliation | 1 Faculty of Kinesiology University of Calgary Calgary Canada 3 College of Health and Life Sciences Hamad Bin Khalifa University Doha Qatar 4 College of Medicine University of Central Florida Orlando Florida USA 2 Applied Physiology and Nutrition Research Group ‐ Center of Lifestyle Medicine, Faculdade de Medicina FMUSP Universidade de São Paulo São Paulo Brazil |
AuthorAffiliation_xml | – name: 4 College of Medicine University of Central Florida Orlando Florida USA – name: 1 Faculty of Kinesiology University of Calgary Calgary Canada – name: 2 Applied Physiology and Nutrition Research Group ‐ Center of Lifestyle Medicine, Faculdade de Medicina FMUSP Universidade de São Paulo São Paulo Brazil – name: 3 College of Health and Life Sciences Hamad Bin Khalifa University Doha Qatar |
Author_xml | – sequence: 1 givenname: Pablo R. orcidid: 0000-0002-3231-3445 surname: Fleitas‐Paniagua fullname: Fleitas‐Paniagua, Pablo R. organization: University of Calgary – sequence: 2 givenname: Rafael orcidid: 0000-0002-0346-7007 surname: Almeida Azevedo fullname: Almeida Azevedo, Rafael organization: Universidade de São Paulo – sequence: 3 givenname: Mackenzie surname: Trpcic fullname: Trpcic, Mackenzie organization: University of Calgary – sequence: 4 givenname: Juan M. orcidid: 0000-0002-6460-6453 surname: Murias fullname: Murias, Juan M. organization: Hamad Bin Khalifa University – sequence: 5 givenname: Bruce orcidid: 0000-0001-8458-4709 surname: Rogers fullname: Rogers, Bruce email: bjrmd@knights.ucf.edu organization: University of Central Florida |
BackLink | https://www.ncbi.nlm.nih.gov/pubmed/37549966$$D View this record in MEDLINE/PubMed |
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Keywords | exercise thresholds cycling ramp endurance exercise heart rate variability intensity distribution |
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Snippet | An index of heart rate variability (HRV), detrended fluctuation analysis (DFA a1) has gathered interest as a surrogate marker of exercise intensity boundaries.... Abstract An index of heart rate variability (HRV), detrended fluctuation analysis (DFA a1) has gathered interest as a surrogate marker of exercise intensity... |
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SubjectTerms | Bicycling - physiology Carbon dioxide cycling ramp endurance exercise Exercise intensity Exercise Test exercise thresholds Females Gas exchange Heart rate Heart Rate - physiology heart rate variability Humans intensity distribution Metabolism Nervous system Original Oxygen Consumption - physiology Physical fitness Physiology Reproducibility of Results Ventilation |
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Title | Effect of ramp slope on intensity thresholds based on correlation properties of heart rate variability during cycling |
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