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The ratio of heart rate to heart rate variability reflects sympathetic activity during incremental cycling exercise.
- Source :
-
European Journal of Sport Science . Nov2022, Vol. 22 Issue 11, p1714-1723. 10p. 1 Chart, 3 Graphs. - Publication Year :
- 2022
-
Abstract
- A low-frequency to a high-frequency component ratio (LF/HF) in heart rate variability (HRV) may not accurately reflect sympathetic nervous activity during exercise. Thus, a valid HRV-based index of sympathetic nervous activity is needed. Therefore, the heart rate to LF ratio (Heart rate/LF) was evaluated as sympathetic nervous activity index which is reflected by catecholamine levels during incremental exercise. In this study, 15 healthy adults performed an incremental exercise test using a cycle ergometer. HRV was derived from electrocardiography and HRV components related to the autonomic nervous system were obtained using frequency analysis. Heart rate/LF was calculated using the heart rate and LF component produced by HRV analysis. Catecholamine, blood lactate levels and respiratory gas were also measured throughout the exercise test. While LF/HF did not increase with increasing exercise intensity, Heart rate/LF non-linearly increased during the incremental exercise test, as did noradrenaline and blood lactate. Interestingly, Heart rate/LF values were positively correlated with noradrenaline (ρ = 0.788, p < 0.05) and blood lactate (ρ = 0.802, p < 0.05) levels and carbon dioxide production (ρ = 0.903, p < 0.05) from at rest through the exercise stages. Heart rate/LF reflects sympathetic nervous activity and metabolic responses during incremental cycling exercise and has potential as an HRV index of sympathetic nervous activity during exercise. Trial registration: UMIN Japan identifier: UMIN000039639. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 17461391
- Volume :
- 22
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- European Journal of Sport Science
- Publication Type :
- Academic Journal
- Accession number :
- 160241451
- Full Text :
- https://doi.org/10.1080/17461391.2021.1994652