ERRORS IN PREDICTING MAXIMAL OXYGEN-CONSUMPTION IN PREGNANT-WOMEN
ERRORS IN PREDICTING MAXIMAL OXYGEN-CONSUMPTION IN PREGNANT-WOMEN
复制标题
DOI：
10.1152/jappl.1992.72.2.562
复制
发表时间：
1992-02-01
影响因子：
3.3
通讯作者：
WALLENBURG, HCS
中科院分区：
文献类型：
--
作者：
LOTGERING, FK;STRUIJK, PC;WALLENBURG, HCS
本研究旨在确定妊娠期间最大心率 (HR(max)) 和耗氧量 (VO2) 估计值的准确性。 我们测量了静息和周期 (CE) 时的心率和最大摄氧量 (VO2max) 以及跑步机运动 (TE) 测试，在妊娠期间和分娩后快速增加运动强度。我们发现怀孕会影响 HR 和 % VO2max 的线性关系，因此截距会随着妊娠的推进而增加，斜率会减小。估计的最大心率 (HR(max,est))，220 - 年龄 (yr) X 次/分钟，高估测量的 HR(max)对于通过 Asstrand 列线图 (VO2max,est1) 以及通过 HR 和 VO2 的次最大值线性外推至 HR(max,est) (VO2max,est2) 估计的 VO2max，个体误差很大 (SD 17-28%)，在 CE 期间，平均 VO2max,est1 高估了测量的 VO2max 20%。 (-2%) 并引发了妊娠期间 CE 期间 VO2max 下降的错误印象。这种明显的准确性源于两个相反的错误：1) HR(max,est) 高估了 HR(max)，2) 高于 70% VO2max 时，HR-%VO2max 关系的斜率显着降低。 因此，两种估计 VO2max 的方法都不能取代 VO2max 的测量。
This study was designed to determine the accuracy of estimated values of maximal heart rate (HR(max)) 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 (HR(max,est)), 220 - age (yr) X beats/min, overestimated measured HR(max) 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 HR(max,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) HR(max,est) overestimated HR(max), 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.