School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada.
Birth Defects Res. 2021 Feb 1;113(3):276-286. doi: 10.1002/bdr2.1808. Epub 2020 Sep 23.
Exercise is known to improve the health of the pregnant woman and her child. Studies that have evaluated physiological parameters during prenatal exercise have conflicting results. Better understanding of these physiological responses can modify exercise prescriptions, safety, and monitoring strategies. We examined the association between age, prepregnancy body mass index (BMI), gestational weight gain (GWG), and physical activity (PA) levels, factors that may influence a change in physiological (HR, VO responses) and perceptual (RPE) responses to acute exercise throughout pregnancy.
Twenty-two healthy pregnant women (31.4 ± 3.7 years) performed a Submaximal incremental Walking Exercise Test (SWET). Early- (13-18 weeks), mid- (24-28 weeks), and late-pregnancy (34-37 weeks) were compared. VO (L/min; ml/kg/min), HR (bpm), and RPE were collected at the end of each test stage. PA was determined by accelerometry. We associated PA levels, GWG, prepregnancy BMI, and age with HR, RPE, and VO responses.
HR, RPE, and absolute VO were higher in late-pregnancy compared to earlier time points (p < .05; η = 0.299-0.525). Regression models were built for HR (all time points), RPE (early- and late-pregnancy), and VO (L/min; late-pregnancy). HR (late-pregnancy) was predicted by time in vigorous PA, GWG, age, and prepregnancy BMI (r = 0.645; SEE = 5.84). RPE (late-pregnancy) was predicted by sedentary time, GWG, prepregnancy BMI, and age (r = 0.662; SEE = 1.21).
Physiological/perceptual responses were higher in late-pregnancy compared to other time points and associated with combined PA, GWG, prepregnancy BMI, and age. These findings can be used to modify exercise prescriptions and designs for future PA interventions in pregnant women.
运动有益于孕妇及其胎儿的健康。评估产前运动期间生理参数的研究结果存在差异。更好地了解这些生理反应可以修改运动处方、安全性和监测策略。我们研究了年龄、孕前体重指数（BMI）、妊娠体重增加（GWG）和体力活动（PA）水平与生理（HR、VO 反应）和知觉（RPE）对妊娠期间急性运动反应变化的相关性。
22 名健康孕妇（31.4±3.7 岁）进行了亚最大递增步行运动试验（SWET）。比较早孕期（13-18 周）、中孕期（24-28 周）和晚孕期（34-37 周）。在每个测试阶段结束时收集 VO（L/min；ml/kg/min）、HR（bpm）和 RPE。PA 通过加速度计确定。我们将 PA 水平、GWG、孕前 BMI 和年龄与 HR、RPE 和 VO 反应相关联。
与早期时间点相比，晚期妊娠的 HR、RPE 和绝对 VO 更高（p<.05；η=0.299-0.525）。建立了 HR（所有时间点）、RPE（早、晚期妊娠）和 VO（L/min；晚期妊娠）的回归模型。HR（晚期妊娠）由剧烈 PA、GWG、年龄和孕前 BMI 的时间预测（r=0.645；SEE=5.84）。RPE（晚期妊娠）由久坐时间、GWG、孕前 BMI 和年龄预测（r=0.662；SEE=1.21）。
与其他时间点相比，晚期妊娠的生理/知觉反应更高，并与综合 PA、GWG、孕前 BMI 和年龄相关。这些发现可用于修改妊娠妇女的运动处方和设计未来的 PA 干预措施。
