The effects of respiration on heart rate and blood pressure spectra during exercise below the ventilatory threshold

D. A. Newandee, S. S. Reisman, Matthew N. Bartels, R. E. De Meersman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The purpose of this study was to determine how heart rate and blood pressure variabilities (HRV and BPV) change with steady-state exercise up to the ventilatory threshold (VT). The VT was determined using the V-slope method of computer regression analysis of the plot of carbon dioxide production versus oxygen consumption (VO2max). Twelve healthy subjects performed 1) cycle ergometry (exercise protocol) at 50%, 75% and 100% of previously determined VT and 2) sitting at rest and breathing at matched respiratory rates and volume (controlled breathing, CB) as during the exercise protocol. Throughout the CB protocol carbon dioxide was added to maintain normal gas homeostasis. Heart rate and blood pressure spectra for both protocols were derived from 3-minute epochs of stationary data using frequency domain analyses. These data were analyzed by repeated measures ANOVA and coherence analyses between heart rate and respiration as well as blood pressure and respiration. The ANOVA revealed significant changes in heart rate and blood pressure spectra for both low frequency (LF, 0.04-0.15 Hz) and high frequency (HF, 0.15-0.4 Hz) modulations between all stages of the exercise protocol (p

Original languageEnglish (US)
Title of host publicationProceedings of the IEEE Annual Northeast Bioengineering Conference, NEBEC
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages47-48
Number of pages2
Volume2002-January
ISBN (Print)0780374193
DOIs
StatePublished - 2002
Externally publishedYes
Event28th IEEE Annual Northeast Bioengineering Conference, NEBC 2002 - Philadelphia, United States
Duration: Apr 20 2002Apr 21 2002

Other

Other28th IEEE Annual Northeast Bioengineering Conference, NEBC 2002
CountryUnited States
CityPhiladelphia
Period4/20/024/21/02

Keywords

  • Analysis of variance
  • Blood pressure
  • Blood pressure variability
  • Carbon dioxide
  • Frequency
  • Heart rate
  • Heart rate variability
  • Protocols
  • Regression analysis
  • Steady-state

ASJC Scopus subject areas

  • Bioengineering

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