Key result
Extrapolating VO2-HR curves predicts VO2max in pregnant women with ~2% underestimation, beating the Astrand method.
Why the study?
What is the most accurate method for predicting VO2max during cycle exercise in pregnant women?
Population
40 pregnant women and a comparison group of 10 nonpregnant sedentary women
Comparison
Prediction of VO2max using extrapolation of the… vs Astrand nomogram method, a derived equation…
Design
Cross-sectional
Authors
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May support more accurate VO2max estimation in pregnant women during cycling; leaves open prospective validation before clinical adoption.
Cross-Sectional (n=50)
What is the most accurate method for predicting VO2max during cycle exercise in pregnant women?
Absolute Event Rate: 1.6% vs 9%
p-value: p=>0.05
Extrapolating the VO2-HR curve to an estimated maximal heart rate is the most accurate method for predicting VO2max during cycle exercise in pregnant women.
Sady et al. (1988) conducted a cross-sectional in Pregnancy (n=50). VO2-HR curve method vs. Astrand nomogram was evaluated on Percent difference between estimated and actual VO2max (p=>0.05). Extrapolating the VO2-HR curve to an estimated maximal HR accurately predicted VO2max in pregnant women, underestimating actual values by 1.6% compared to a 9.0% overestimation with the Astrand method.
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