title: Validity of predicting mean arterial blood pressure during exercise.
abstract: OBJECTIVE
  Mean arterial blood pressure (mean arterial pressure (MAP)) at rest is conventionally estimated as the product of the diastolic pressure plus one-third of the pulse pressure. Since pulse wave forms and the duration of diastole change during exercise, one might question the validity of this prediction equation for the exercise state. Our purpose was to test this by directly measuring blood pressure over a wide range of exercise intensities.
  
  
  METHODS
  Pressure was recorded by arterial catheterization in 29 subjects performing progressive exercise and/or constant-load exercise at different intensities. Actual MAP was measured by integrating the area under the pulse curve and compared it with the value which was predicted from systolic and diastolic measures over heart rates ranging from 100 to 200 beats x min(-1).
  
  
  RESULTS
  Predicted values were quite close to actual MAP, and the accuracy of the prediction equation changed minimally with increased exercise intensity.
  
  
  CONCLUSIONS
  This method provides a valid estimation of MAP during exercise.
authors.affiliation: Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada. macdoug@mcmail.cis.mcmaster.ca
authors.forename: J D
authors.initials: JD
authors.lastname: MacDougall
authors.forename: M
authors.initials: M
authors.lastname: Brittain
authors.forename: J R
authors.initials: JR
authors.lastname: MacDonald
authors.forename: R S
authors.initials: RS
authors.lastname: McKelvie
authors.forename: D E
authors.initials: DE
authors.lastname: Moroz
authors.forename: M A
authors.initials: MA
authors.lastname: Tarnopolsky
authors.forename: J S
authors.initials: JS
authors.lastname: Moroz
mesh_terms: D000328:Adult; D001795:Blood Pressure Determination / Q000379:methods*; D003971:Diastole; D015444:Exercise; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D011674:Pulse; D013599:Systole