Journal of Applied Physiology AJP: Cell Physiology
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J Appl Physiol 72: 562-567, 1992;
8750-7587/92 $5.00
This Article
Right arrow Full Text (PDF)
Right arrow Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Lotgering, F. K.
Right arrow Articles by Wallenburg, H. C.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Lotgering, F. K.
Right arrow Articles by Wallenburg, H. C.

Journal of Applied Physiology, Vol 72, Issue 2 562-567, Copyright © 1992 by American Physiological Society

ARTICLES

Errors in predicting maximal oxygen consumption in pregnant women

F. K. Lotgering, P. C. Struijk, M. B. van Doorn and H. C. Wallenburg
Department of Obstetrics and Gynecology, Erasmus University School of Medicine and Health Sciences, Rotterdam, The Netherlands.

This study was designed to determine the accuracy of estimated values of maximal heart rate (HRmax) and oxygen consumption (VO2) during pregnancy. We measured HR and maximal VO2 (VO2max) at rest and during cycle (CE) and treadmill exercise (TE) tests with rapidly increasing exercise intensities during gestation and after delivery. Pregnancy was found to affect the linear relationship of HR and %VO2max so that the intercept increases with advancing gestation and the slope decreases. Estimated maximal HR (HRmax, est), 220 - age (yr) x beats/min, overestimated measured HRmax by 8% (CE) and 5% (TE). For VO2max estimated by Astrand's nomogram (VO2max, est1) and by linear extrapolation of submaximal values of HR and VO2 to HRmax, est (VO2max, est2), individual errors were large (SD 17-28%). Mean VO2max, est1 overestimated measured VO2max by 20% during CE but not during TE (-2%) and elicited the erroneous impression that VO2max decreases during CE in pregnancy. Mean VO2max, est2 values were not significantly different from measured VO2max values. This apparent accuracy resulted from two opposing errors: 1) HRmax, est overestimated HRmax, and 2) above 70% VO2max the slope of the HR-%VO2max relationship was significantly reduced. Therefore neither method to estimate VO2max can replace the measurement of VO2max.


This article has been cited by other articles:


Home page
 J. Appl. Physiol.Home page
N. D. Avery, L. A. Wolfe, C. E. Amara, G. A. L. Davies, and M. J. McGrath
Effects of human pregnancy on cardiac autonomic function above and below the ventilatory threshold
J Appl Physiol, January 1, 2001; 90(1): 321 - 328.
[Abstract] [Full Text] [PDF]

Home page
 Obstet GynecolHome page
A. P. HEENAN, L. A. WOLFE, and G. A. L. DAVIES
Maximal Exercise Testing in Late Gestation: Maternal Responses
Obstet. Gynecol., January 1, 2001; 97(1): 127 - 134.
[Abstract] [Full Text] [PDF]

Home page
 ptjournalHome page
V. Noonan and E. Dean
Submaximal Exercise Testing: Clinical Application and Interpretation
Physical Therapy, August 1, 2000; 80(8): 782 - 807.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
J. G. Kemp, F. A. Greer, and L. A. Wolfe
Acid-base regulation after maximal exercise testing in late gestation
J Appl Physiol, August 1, 1997; 83(2): 644 - 651.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Visit Other APS Journals Online