Journal article
Correlation integral of blood pressure as a marker for exercise intensities
The American journal of physiology, Vol.275(5), pp.R1661-1666
11/1998
DOI: 10.1152/ajpregu.1998.275.5.r1661
PMID: 9791088
Abstract
The purpose of this study was to test the hypothesis that the correlation integral technique detects altered regulation of cardiovascular function during graded treadmill exercise. Arterial blood pressure (BP) was measured via telemetry before and during graded treadmill exercise in Sprague-Dawley rats. During treadmill running at mild, moderate, and heavy exercise intensities, the slope of the correlation integrals (SCI) continuously increased from 5.45 +/- 0.17 to 7.12 +/- 0.18, 7.92 +/- 0.23, and 8.40 +/- 0.23, respectively. However, corresponding changes in pulse interval, blood pressure, and systolic blood pressure with increasing workload were not consistently observed. Low-frequency, midfrequency, and high-frequency powers of BP were not different between adjacent exercise grades; only the low-frequency component of pulse interval was different between resting state and mild exercise, and BP variance was significantly different between mild and moderate grades. Comparison of the SCI values with those obtained from surrogate data sets suggests that these differences originate mainly from nonlinear components in the cardiovascular control system. These findings support the hypothesis that SCI detects alterations in cardiovascular regulation associated with graded exercise. Furthermore, SCI may be superior to linear techniques in detecting altered regulation with changing exercise intensities.
Details
- Title: Subtitle
- Correlation integral of blood pressure as a marker for exercise intensities
- Creators
- C D Wagner - Department of Physiology, Humboldt University of Berlin, D-10117 Berlin, GermanyH M StaussP B PerssonK C Kregel
- Resource Type
- Journal article
- Publication Details
- The American journal of physiology, Vol.275(5), pp.R1661-1666
- DOI
- 10.1152/ajpregu.1998.275.5.r1661
- PMID
- 9791088
- ISSN
- 0002-9513
- eISSN
- 2163-5773
- Grant note
- AG-12350 / NIA NIH HHS
- Language
- English
- Date published
- 11/1998
- Academic Unit
- Radiation Oncology; Provost Office Administration; Health and Human Physiology
- Record Identifier
- 9984213310102771
Metrics
20 Record Views