Rapid adjustments to autonomic control of cardiac rhythm at the onset of isometric exercise in healthy young adults
Abstract Sympathetic nervous system (SNS) and parasympathetic nervous system (PNS) influences on cardiac rhythm at the onset of exercise, a time of rapid autonomic adjustments, are clinically important areas of investigation. Continuous wavelet transform (CWT) involves time‐frequency‐based heart rat...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-02-01
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| Series: | Physiological Reports |
| Subjects: | |
| Online Access: | https://doi.org/10.14814/phy2.15616 |
| _version_ | 1797397551511502848 |
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| author | Tyler E. Oliver Miguel E. Sánchez‐Hechavarría Ramón Carrazana‐Escalona Cheryl A. Blaha Lawrence I. Sinoway Rachel C. Drew |
| author_facet | Tyler E. Oliver Miguel E. Sánchez‐Hechavarría Ramón Carrazana‐Escalona Cheryl A. Blaha Lawrence I. Sinoway Rachel C. Drew |
| author_sort | Tyler E. Oliver |
| collection | DOAJ |
| description | Abstract Sympathetic nervous system (SNS) and parasympathetic nervous system (PNS) influences on cardiac rhythm at the onset of exercise, a time of rapid autonomic adjustments, are clinically important areas of investigation. Continuous wavelet transform (CWT) involves time‐frequency‐based heart rate variability (HRV) analysis allowing investigation of autonomic influences on cardiac rhythm during short durations of exercise. Therefore, the purpose of this study was to characterize SNS and PNS influences on cardiac rhythm at the onset of isometric exercise in healthy young adults. CWT analysis was retrospectively applied to R‐R interval data (electrocardiogram) previously collected from 14 healthy young adults (26 ± 2 years) who performed 30‐s, one‐legged, isometric, calf exercise at 70% maximal voluntary contraction (MVC; 70% MVC trial) or rested (0% MVC trial). Absolute and normalized low‐frequency (aLF, nLF; 0.04–0.15 Hz) and high‐frequency (aHF, nHF; 0.15–0.4 Hz) bands and LF/HF were used to analyze one 30‐s baseline period and six 5‐s time windows during the 30‐s exercise (70% MVC) or rest (0% MVC). Statistical analysis involved two‐way analysis of variance with post‐hoc analysis. aHF, aLF, LF/HF, nHF, and nLF displayed a trial‐time interaction (all p ≤ 0.027). In the 70% compared to the 0% MVC trial, aHF and nHF were lower after 5–30 s (all p ≤ 0.040), aLF was lower after 20–30 s (all p ≤ 0.011) and LF/HF and nLF were higher after 5–20 s (all p ≤ 0.045). These results indicate the reduction of the PNS influence on cardiac rhythm begins sooner than the augmentation of the SNS influence at the onset of isometric exercise in healthy young adults. |
| first_indexed | 2024-03-09T01:12:42Z |
| format | Article |
| id | doaj.art-75eebf6726254b4688c6c1dac4d0ddfb |
| institution | Directory Open Access Journal |
| issn | 2051-817X |
| language | English |
| last_indexed | 2024-03-09T01:12:42Z |
| publishDate | 2023-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Physiological Reports |
| spelling | doaj.art-75eebf6726254b4688c6c1dac4d0ddfb2023-12-11T03:15:46ZengWileyPhysiological Reports2051-817X2023-02-01114n/an/a10.14814/phy2.15616Rapid adjustments to autonomic control of cardiac rhythm at the onset of isometric exercise in healthy young adultsTyler E. Oliver0Miguel E. Sánchez‐Hechavarría1Ramón Carrazana‐Escalona2Cheryl A. Blaha3Lawrence I. Sinoway4Rachel C. Drew5Department of Exercise and Health Sciences University of Massachusetts Boston Boston Massachusetts USADepartamento de Ciencias Básicas, Facultad de Medicina Universidad Católica de la Santísima Concepción Concepción ChileDepartamento de Ciencias Básicas, Facultad de Medicina Universidad Católica de la Santísima Concepción Concepción ChilePenn State Heart and Vascular Institute, Penn State College of Medicine Hershey Pennsylvania USAPenn State Heart and Vascular Institute, Penn State College of Medicine Hershey Pennsylvania USADepartment of Exercise and Health Sciences University of Massachusetts Boston Boston Massachusetts USAAbstract Sympathetic nervous system (SNS) and parasympathetic nervous system (PNS) influences on cardiac rhythm at the onset of exercise, a time of rapid autonomic adjustments, are clinically important areas of investigation. Continuous wavelet transform (CWT) involves time‐frequency‐based heart rate variability (HRV) analysis allowing investigation of autonomic influences on cardiac rhythm during short durations of exercise. Therefore, the purpose of this study was to characterize SNS and PNS influences on cardiac rhythm at the onset of isometric exercise in healthy young adults. CWT analysis was retrospectively applied to R‐R interval data (electrocardiogram) previously collected from 14 healthy young adults (26 ± 2 years) who performed 30‐s, one‐legged, isometric, calf exercise at 70% maximal voluntary contraction (MVC; 70% MVC trial) or rested (0% MVC trial). Absolute and normalized low‐frequency (aLF, nLF; 0.04–0.15 Hz) and high‐frequency (aHF, nHF; 0.15–0.4 Hz) bands and LF/HF were used to analyze one 30‐s baseline period and six 5‐s time windows during the 30‐s exercise (70% MVC) or rest (0% MVC). Statistical analysis involved two‐way analysis of variance with post‐hoc analysis. aHF, aLF, LF/HF, nHF, and nLF displayed a trial‐time interaction (all p ≤ 0.027). In the 70% compared to the 0% MVC trial, aHF and nHF were lower after 5–30 s (all p ≤ 0.040), aLF was lower after 20–30 s (all p ≤ 0.011) and LF/HF and nLF were higher after 5–20 s (all p ≤ 0.045). These results indicate the reduction of the PNS influence on cardiac rhythm begins sooner than the augmentation of the SNS influence at the onset of isometric exercise in healthy young adults.https://doi.org/10.14814/phy2.15616autonomic controlcardiac rhythmexercise onsetheart rate variabilityisometric exercise |
| spellingShingle | Tyler E. Oliver Miguel E. Sánchez‐Hechavarría Ramón Carrazana‐Escalona Cheryl A. Blaha Lawrence I. Sinoway Rachel C. Drew Rapid adjustments to autonomic control of cardiac rhythm at the onset of isometric exercise in healthy young adults Physiological Reports autonomic control cardiac rhythm exercise onset heart rate variability isometric exercise |
| title | Rapid adjustments to autonomic control of cardiac rhythm at the onset of isometric exercise in healthy young adults |
| title_full | Rapid adjustments to autonomic control of cardiac rhythm at the onset of isometric exercise in healthy young adults |
| title_fullStr | Rapid adjustments to autonomic control of cardiac rhythm at the onset of isometric exercise in healthy young adults |
| title_full_unstemmed | Rapid adjustments to autonomic control of cardiac rhythm at the onset of isometric exercise in healthy young adults |
| title_short | Rapid adjustments to autonomic control of cardiac rhythm at the onset of isometric exercise in healthy young adults |
| title_sort | rapid adjustments to autonomic control of cardiac rhythm at the onset of isometric exercise in healthy young adults |
| topic | autonomic control cardiac rhythm exercise onset heart rate variability isometric exercise |
| url | https://doi.org/10.14814/phy2.15616 |
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