Key result
Pregnancy was associated with a lower peak VCO2 relative to peak VO2 compared with postpartum, suggesting reduced buffering of lactic acid during pregnancy.
Why the study?
Does pregnancy alter the VCO2/VO2 relationship, anaerobic threshold, and respiratory compensation point during maximal exercise compared to postpartum?
Population
33 pregnant volunteers evaluated at 16-, 25-, and 35-wk gestation and postpartum
Comparison
Cycle exercise tests with rapidly increasing… vs Postpartum state (within-subject comparison)
Design
Cohort
Follow-up
From 16 weeks gestation to postpartum
Authors
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May warrant caution interpreting ventilatory thresholds on CPET in pregnancy; leaves open need for pregnancy-specific norms.
Observational (n=33)
Does pregnancy alter the VCO2/VO2 relationship, anaerobic threshold, and respiratory compensation point during maximal exercise compared to postpartum?
During pregnancy, the buffering of lactic acid appears reduced, as evidenced by a shallower slope of VCO2 vs. VO2 above the anaerobic threshold during maximal exercise.
Lotgering et al. (1995) conducted an observational in Pregnancy (n=33). Pregnancy vs. Postpartum was evaluated on Anaerobic threshold (AT) and respiratory compensation (RC) point. Pregnancy was associated with a lower peak VCO2 relative to peak VO2 compared with postpartum, suggesting reduced buffering of lactic acid during pregnancy.
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