Department of Nursing, Faculty of Health Sciences, University of Granada, Granada, Spain.
UGC of Gynaecology and Obstetrics, San Cecilio-Campus University Hospital, Granada, Spain.
Scand J Med Sci Sports. 2019 Mar;29(3):407-414. doi: 10.1111/sms.13337. Epub 2018 Dec 17.
(a) To analyse the association of objectively measured sedentary time (ST) and physical activity (PA) during early second trimester of pregnancy with maternal and neonatal birth outcomes; (b) to explore if ST and PA differ between women with vaginal or caesarean section deliveries.
Ninety-four Caucasian pregnant women (32.9 ± 4.6 years old) participated in this prospective longitudinal study. Triaxial accelerometers were used to assess ST and PA intensity levels for seven consecutive days during second trimester of pregnancy. Birth data were collected from the obstetric medical records. Umbilical cord arterial and venous blood gas (pH, partial pressure of carbon dioxide and oxygen, and oxygen saturation) were analysed after birth.
After adjusting for potential confounders, greater ST was associated with higher arterial and venous cord blood partial pressure of carbon dioxide and more acidic arterial and venous pH (all, P < 0.01). Moderate PA, moderate-to-vigorous PA (MVPA), total PA and steps per day were positively associated with arterial cord blood oxygen saturation (all P < 0.05). Steps per day were inversely associated with gestational age at birth (P < 0.01), and duration of first stage of labor (P < 0.05). Total and light PA were associated with a more alkaline pH in umbilical vein (all, P < 0.01). Vigorous PA was inversely associated with the Apgar score (P < 0.01). No significant differences were observed in ST and PA levels between women with vaginal and women with caesarean section deliveries (all, P > 0.10).
Increasing PA and decreasing ST during pregnancy might promote better maternal and neonatal birth markers.
(a) 分析妊娠中期早期客观测量的久坐时间（ST）和体力活动（PA）与母婴出生结局的关系；(b) 探讨阴道分娩和剖宫产分娩的女性之间 ST 和 PA 是否存在差异。
94 名白种人孕妇（32.9±4.6 岁）参加了这项前瞻性纵向研究。使用三轴加速度计在妊娠中期连续 7 天测量 ST 和 PA 强度水平。分娩数据从产科病历中收集。分娩后分析脐动脉和静脉血气（pH 值、二氧化碳分压和氧分压以及氧饱和度）。
在校正潜在混杂因素后，较长的 ST 与较高的动脉和静脉脐带血二氧化碳分压以及更酸性的动脉和静脉 pH 值相关（均 P<0.01）。适度 PA、中等到剧烈 PA（MVPA）、总 PA 和每天步数与动脉脐带血氧饱和度呈正相关（均 P<0.05）。每天的步数与出生时的胎龄（P<0.01）和第一产程的持续时间（P<0.05）呈负相关。总 PA 和轻 PA 与脐静脉 pH 值呈碱性相关（均 P<0.01）。剧烈 PA 与 Apgar 评分呈负相关（P<0.01）。阴道分娩和剖宫产分娩的女性之间 ST 和 PA 水平没有显著差异（均 P>0.10）。
妊娠期间增加 PA 和减少 ST 可能会促进更好的母婴出生标志物。
