Avery N D, Stocking K D, Tranmer J E, Davies G A, Wolfe L A
Dept. of Physiology, Queen's University, Kingston, Ontario.
Can J Appl Physiol. 1999 Aug;24(4):362-76. doi: 10.1139/h99-028.
Cardiovascular responses to strength conditioning exercises were examined in 12 healthy pregnant women and their unborn fetuses during the third trimester. A group of 12 healthy nonpregnant women of similar ages, parity, body height, and pre-pregnant body mass was also studied. Maternal heart rate and blood pressure and fetal heart rate (FHR) responses were measured in both the supine (30 degrees tilt) and seated postures during handgrip (HG), single-leg extension (SL), and double-leg extension (DL) exercise. Subjects performed 3 sets of 10 reps at 50, 70, and 90% of their 10-repetition maximum (10-RM) for each exercise in both postures. Pregnant subjects exhibited higher heart rates but similar blood pressure responses to control subjects under all experimental conditions. Significant increases were observed for the frequency of FHR accelerations (0.10 to 0.27/min) from rest to DL in the sitting posture at 90% RM. Moderate fetal bradycardia was observed occasionally in the tilted supine posture at rest and both during (SL, DL) and following (HG, SL, DL) exercise, suggesting that this posture should be avoided in late gestation. The results support the safety of moderate strength conditioning exercises in healthy pregnancy.
在孕晚期，对12名健康孕妇及其未出生胎儿进行了力量训练运动的心血管反应研究。还对一组12名年龄、胎次、身高和孕前体重相似的健康非孕妇进行了研究。在握力（HG）、单腿伸展（SL）和双腿伸展（DL）运动期间，分别在仰卧位（30度倾斜）和坐位测量孕妇的心率、血压以及胎儿心率（FHR）反应。受试者在两种姿势下，针对每项运动，均以其10次重复最大值（10-RM）的50%、70%和90%进行3组，每组10次重复动作。在所有实验条件下，孕妇的心率均高于对照组，但血压反应相似。在坐位以90%RM从休息到DL运动时，观察到FHR加速频率显著增加（从0.10次/分钟增加到0.27次/分钟）。在休息时、运动期间（SL、DL）以及运动后（HG、SL、DL）的仰卧位倾斜姿势下，偶尔观察到中度胎儿心动过缓，这表明在妊娠晚期应避免这种姿势。结果支持了健康孕妇进行适度力量训练运动的安全性。
