| The mathematical analysis of the heart rate and blood lactate curves during incremental exercise testing. | |
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MedLine Citation:
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PMID: 22173027 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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This paper describes a new mathematical approach for the analysis of HR (heart rate) and BL (blood lactate) curves during incremental exercise testing using a HR/BL curve and its derivatives, taking into account the native shape of all curves, without any linear approximation. Using this approach the results indicate the apperance of three characteristic points (A, B and C) on the HR/BL curve. The point A on the HR/BL curve which is the value that corresponds to the load (12.73 ± 0.46 km h-1) at which BL starts to increase above the resting levels (0.9 ± 0.06 mM), and is analogous to Lactate Turn Point 1 (LTP1). The point C on the HR/BL curve which corresponds to a BL of approximately 4mM, and is analogous to LTP2. The point B on the HR/BL curve, which corresponds to the load (16.32 ± 0.49 km h-1) at which the moderate increase turns into a more pronounced increase in BL. This point has not been previously recognized in literature. We speculate this point represents attenuation of left ventricular ejection fraction (LVEF) increase, accompained by the decrease in diastolic time duration during incremental exercise testing. Proposed mathematical approach allows precise determination of lactate turnpoints during incremental exercise testing. |
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Authors:
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Mirko Rosic; V Ilic; Z Obradovic; S Pantovic; G Rosic |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Acta physiologica Hungarica Volume: 98 ISSN: 0231-424X ISO Abbreviation: Acta Physiol Hung Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-12-16 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8309201 Medline TA: Acta Physiol Hung Country: Hungary |
Other Details:
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Languages: eng Pagination: 456-64 Citation Subset: IM |
Affiliation:
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University of Kragujevac Department of Physiology, Faculty of Medicine Kragujevac, Novi Sad Serbia Research Center of Serbian Academy of Arts and Sciences and the University of Kragujevac Kragujevac Serbia University of Kragujevac Department of Physiology, Faculty of Medicine Svetozara Markovica St. 69 34 000 Kragujevac Serbia. |
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