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Heart Rate Variability, Standard of Measurement, Physiological Interpretation and Clinical Use in Mountain Marathon Runners during Sleep and after Acclimatization at 3480 m
Department of Biomedical and Clinical Science Luigi Sacco, University of Milan, Milan, Italy
Department of Biomedical and Clinical Science Luigi Sacco, University of Milan, Milan, Italy
Department of Biomedical and Clinical Science Luigi Sacco, University of Milan, Milan, Italy
Department of Biomedical and Clinical Science Luigi Sacco, University of Milan, Milan, Italy
Department of Biomedical and Clinical Science Luigi Sacco, University of Milan, Milan, Italy
Education and Research Department Isokinetic, Bologna, Italy
- 1 Department of Biomedical and Clinical Science Luigi Sacco, University of Milan, Milan, Italy
- 2 Department of Biomedical and Clinical Science Luigi Sacco, University of Milan, Milan, Italy
- 3 Department of Biomedical and Clinical Science Luigi Sacco, University of Milan, Milan, Italy
- 4 Department of Biomedical and Clinical Science Luigi Sacco, University of Milan, Milan, Italy
- 5 Department of Biomedical and Clinical Science Luigi Sacco, University of Milan, Milan, Italy
- 6 Education and Research Department Isokinetic, Bologna, Italy
Journal of Behavioral and Brain Science·Volume 03 (2013)·Pages 26–48·Published 26 February 2013·DOI10.4236/jbbs.2013.31004
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Abstract
Fluctuations in autonomic cardiovascular regulation during exposure to high altitude may increase the risk of heart attack during waking and sleep. This study compared heart rate variability (HVR) and its components during sleep at low altitude and after 30 - 41 hours of acclimatization at high altitude (3480 m) in five mountain marathon runners controlled for diet, drugs, light-dark cycle and jet lag. In comparison to sea level, RR-intervals during sleep at high altitude decreased significantly (P < 0.001). The significant increase in sympathetic autonomic cardiovascular modulation at high altitude protects against excessive oxygen deprivation during sleep. Increases in R-R intervals can require longer periods of acclimatization at3480 m to mitigate the effects of altitude/hypoxia on sympathetic tone, thus reducing cardiovascular distress at rest during waking and sleep and probably before during and after athletic performance at altitude.
KeywordsHeart Rate VariabilityVery Low Frequency Fluctuation (VLF<0.04 Hz) RhythmLow-Frequency (LF0.04 - 0.15 Hz) RhythmHigh-Frequency (HF0.15 - 0.4 Hz) RhythmMountain Marathon Runners
- Task Force of the European Society of Cardiology and North America Society of Pacing Electrophysiology, “Heart Rate Variability, Standard of Measurement, Physiological Interpretation and Clinical Use,” European Heart Journal, Vol. 17, 1996, pp. 354-381. doi:10.1093/oxfordjournals.eurheartj.a014868
- P. A. Lanfranchi, R. Colombo, G. Cremona, P. Baderna, L. Spagnolati, G. Mazzuero, P. Wagner, L. Perini, H. Wagner, C. Cavallaro and P. Giannuzzi, “Autonomic Cardiovascular Regulation in Subjects with Acute Mountain Sickness,” American Physiology Heart Circulation Physiology, Vol. 289, No. 6, 2005, pp. H2364-H2372. doi:10.1152/ajpheart.00004.2005
- M. Ako, K. Tokuhiro, S. Uchida, S. Miyazaky, K. Nishihara, J. Mukai, K. Hirao J. Ako and Y. Okubo, “Correlation between Electrophysiography and Heart Rate Variability during Sleep,” Psychiatry and Clinical Neuroscience, Vol. 57, No. 1, 2003, pp. 59-65. doi:10.1046/j.1440-1819.2003.01080.x
- G. Banfi, M. Marinelli, G. S. Roi, A. Colombini, M. Pontillo, M. Giacometti and S. Wade, “Growth Hormone and Insulin-Like Growth Factor I in Athletes Performing a Marathon at 4000 m of Altitude,” Growth Regulation, Vol. 4, 1994, pp. 82-86.
- M. Marinelli, G. S. Roi, M. Giacometti, P. Bonini and G. Banfi, “Cortisol, Testosterone and Free Testosterone in Athletes Performing a Marathon at 4000 m of Altitude,” Hormon Research, Vol. 41, No. 5-6, 1994, pp. 225-229. doi:10.1159/000183929
- G. Banfi, M. Marinelli, G. S. Roi and M. Giacometti, “Platelet Indices in Athletes Performing a Race in Altitude Environment,” Journal of Clinical Laboratory Analysis, Vol. 9, No. 1, 1995, pp. 34-36. doi:10.1002/jcla.1860090106
- G. Banfi, M. Marinelli, P. Bonini, I. Gritti and G. S. Roi, “Pepsinogens and Gastrointestinal Symptoms in Mountain Marathon Runners,” International Journal Sports Medicine, Vol. 17, No. 8, 1996, pp. 554-558. doi:10.1055/s-2007-972894
- G. Banfi, M. Pontillo, M. Marinelli, A. Dolci and G. S. Roi, “Thyrotropin and Free Thyroid Hormones in Athletes during and after Ultra Endurance Sport Performances,” Journal Clinical of Ligand Assay, Vol. 21, No. 3, 1998, pp. 331-334.
- G. S. Roi, M. Giacometti and S. P. von Duvillard, “Marathons in Altitude,” Medicine & Science in Sports & Exercise, Vol. 31, No. 5, 1999, pp. 723-728. doi:10.1097/00005768-199905000-00016
- G. Banfi and A. Dolci, “Preanalytical Phase of Sport Biochemistry and Haematology,” The Journal of Sports Medicine and Physical Fitness, Vol. 43, No. 2, 2003, pp. 223-230.