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Overnight sleeping heart rate variability of Army recruits during a 12-week basic military training course
PURPOSE: This study aimed to quantify sleeping heart rate (HR) and HR variability (HRV) alongside circulating tumor necrosis factor alpha (TNFα) concentrations during 12-week Basic Military Training (BMT). We hypothesised that, despite a high allostatic load, BMT would increase cardiorespiratory fit...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Berlin Heidelberg
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9381457/ https://www.ncbi.nlm.nih.gov/pubmed/35833968 http://dx.doi.org/10.1007/s00421-022-04987-3 |
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author | Macartney, Michael J. Larsen, Penelope Gibson, Neil Michael, Scott Drain, Jace Peoples, Gregory E. Groeller, Herbert |
author_facet | Macartney, Michael J. Larsen, Penelope Gibson, Neil Michael, Scott Drain, Jace Peoples, Gregory E. Groeller, Herbert |
author_sort | Macartney, Michael J. |
collection | PubMed |
description | PURPOSE: This study aimed to quantify sleeping heart rate (HR) and HR variability (HRV) alongside circulating tumor necrosis factor alpha (TNFα) concentrations during 12-week Basic Military Training (BMT). We hypothesised that, despite a high allostatic load, BMT would increase cardiorespiratory fitness and HRV, while lowering both sleeping HR and TNFα in young healthy recruits. METHODS: Sixty-three recruits (18–43 years) undertook ≥ 2 overnight cardiac frequency recordings in weeks 1, 8 and 12 of BMT with 4 h of beat-to-beat HR collected between 00:00 and 06:00 h on each night. Beat-to-beat data were used to derive HR and HRV metrics which were analysed as weekly averages (totalling 8 h). A fasted morning blood sample was collected in the equivalent weeks for the measurement of circulating TNFα concentrations and predicted VO(2)max was assessed in weeks 2 and 8. RESULTS: Predicted VO(2)max was significantly increased at week 8 (+ 3.3 ± 2.6 mL kg(−1) min(−1); p < 0.001). Sleeping HR (wk1, 63 ± 7 b min(−1)) was progressively reduced throughout BMT (wk8, 58 ± 6; wk12, 55 ± 6 b min(−1); p < 0.01). Sleeping HRV reflected by the root mean square of successive differences (RMSSD; wk1, 86 ± 50 ms) was progressively increased (wk8, 98 ± 50; wk12, 106 ± 52 ms; p < 0.01). Fasted circulating TNFα (wk1, 9.1 ± 2.8 pg/mL) remained unchanged at wk8 (8.9 ± 2.5 pg/mL; p = 0.79) but were significantly reduced at wk12 (8.0 ± 2.4 pg/mL; p < 0.01). CONCLUSION: Increased predicted VO(2)max, HRV and reduced HR during overnight sleep are reflective of typical cardiorespiratory endurance training responses. These results indicate that recruits are achieving cardiovascular health benefits despite the high allostatic load associated with the 12-week BMT. |
format | Online Article Text |
id | pubmed-9381457 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Springer Berlin Heidelberg |
record_format | MEDLINE/PubMed |
spelling | pubmed-93814572022-08-18 Overnight sleeping heart rate variability of Army recruits during a 12-week basic military training course Macartney, Michael J. Larsen, Penelope Gibson, Neil Michael, Scott Drain, Jace Peoples, Gregory E. Groeller, Herbert Eur J Appl Physiol Original Article PURPOSE: This study aimed to quantify sleeping heart rate (HR) and HR variability (HRV) alongside circulating tumor necrosis factor alpha (TNFα) concentrations during 12-week Basic Military Training (BMT). We hypothesised that, despite a high allostatic load, BMT would increase cardiorespiratory fitness and HRV, while lowering both sleeping HR and TNFα in young healthy recruits. METHODS: Sixty-three recruits (18–43 years) undertook ≥ 2 overnight cardiac frequency recordings in weeks 1, 8 and 12 of BMT with 4 h of beat-to-beat HR collected between 00:00 and 06:00 h on each night. Beat-to-beat data were used to derive HR and HRV metrics which were analysed as weekly averages (totalling 8 h). A fasted morning blood sample was collected in the equivalent weeks for the measurement of circulating TNFα concentrations and predicted VO(2)max was assessed in weeks 2 and 8. RESULTS: Predicted VO(2)max was significantly increased at week 8 (+ 3.3 ± 2.6 mL kg(−1) min(−1); p < 0.001). Sleeping HR (wk1, 63 ± 7 b min(−1)) was progressively reduced throughout BMT (wk8, 58 ± 6; wk12, 55 ± 6 b min(−1); p < 0.01). Sleeping HRV reflected by the root mean square of successive differences (RMSSD; wk1, 86 ± 50 ms) was progressively increased (wk8, 98 ± 50; wk12, 106 ± 52 ms; p < 0.01). Fasted circulating TNFα (wk1, 9.1 ± 2.8 pg/mL) remained unchanged at wk8 (8.9 ± 2.5 pg/mL; p = 0.79) but were significantly reduced at wk12 (8.0 ± 2.4 pg/mL; p < 0.01). CONCLUSION: Increased predicted VO(2)max, HRV and reduced HR during overnight sleep are reflective of typical cardiorespiratory endurance training responses. These results indicate that recruits are achieving cardiovascular health benefits despite the high allostatic load associated with the 12-week BMT. Springer Berlin Heidelberg 2022-07-14 2022 /pmc/articles/PMC9381457/ /pubmed/35833968 http://dx.doi.org/10.1007/s00421-022-04987-3 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Original Article Macartney, Michael J. Larsen, Penelope Gibson, Neil Michael, Scott Drain, Jace Peoples, Gregory E. Groeller, Herbert Overnight sleeping heart rate variability of Army recruits during a 12-week basic military training course |
title | Overnight sleeping heart rate variability of Army recruits during a 12-week basic military training course |
title_full | Overnight sleeping heart rate variability of Army recruits during a 12-week basic military training course |
title_fullStr | Overnight sleeping heart rate variability of Army recruits during a 12-week basic military training course |
title_full_unstemmed | Overnight sleeping heart rate variability of Army recruits during a 12-week basic military training course |
title_short | Overnight sleeping heart rate variability of Army recruits during a 12-week basic military training course |
title_sort | overnight sleeping heart rate variability of army recruits during a 12-week basic military training course |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9381457/ https://www.ncbi.nlm.nih.gov/pubmed/35833968 http://dx.doi.org/10.1007/s00421-022-04987-3 |
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