Determination of maximal oxygen consumption in exercising pregnant sheep.
Determination of maximal oxygen consumption in exercising pregnant sheep.
复制标题
怀孕羊运动时最大耗氧量的测定。
DOI：
10.1152/jappl.1992.73.1.234
复制
发表时间：
1992
期刊：
影响因子：
--
通讯作者：
Robertshaw,D
中科院分区：
文献类型：
--
作者：
Jones,MT;Rawson,RE;Robertshaw,D
先前对怀孕母羊的研究表明，急性运动可能会导致血浆激素浓度、血流分布以及母体和胎儿体温的变化。然而，大多数这些研究并没有通过测量耗氧量（VO 2）来量化所选择的运动强度。因此，本研究的目的是统计模型的VO 2反应怀孕绵羊跑台（TM）运动，以确定运动强度（%最大VO 2）的先前研究。从妊娠100至130天对具有单胎（n = 9）或双胎（n = 5）的母羊进行研究。TM适应1-2周后，通过测量VO 2（开放式流过法）和血乳酸浓度来确定最大VO 2（VO 2 max）。VO 2测量为TM倾斜度（0、3、5和7度）和速度（0.8-3.4 m/s）的函数。最大摄氧量平均为57 +/- 7（SD）ml.min-1. kg-1，运动期间乳酸峰浓度平均为22 +/- 2 mmol/l。VO 2（ml·min ~（-1）·kg ~（-1））与坡度（INC）和速度（SP）呈线性关系[VO 2 = 0.70（INC）+ 13.95（SP）+ 1.07（INC × SP）- 1.18]（r2 = 0.94）。我们的研究结果表明，大多数以前的研究使用的运动强度低于60%VO2max，并表明需要进一步研究，以检查运动在怀孕期间的影响，在高于60%VO2max的水平。
Previous work with pregnant ewes has shown that acute bouts of exercise may cause changes in plasma hormone concentrations, blood flow distribution, and maternal and fetal temperatures. However, most of these studies do not quantify the chosen exercise intensity through measurement of oxygen consumption (VO2). Therefore the purpose of this study was to statistically model the VO2 response of pregnant sheep to treadmill (TM) exercise to determine the exercise intensities (% maximal VO2) of previous studies. Ewes with either single (n = 9) or twin (n = 5) fetuses were studied from 100 to 130 days of gestation. After 1–2 wk of TM habituation, maximal VO2 (VO2max) was determined by measurements of VO2 (open flow-through method) and blood lactate concentration. VO2 was measured as a function of TM incline (0, 3, 5, and 7 degree) and speed (0.8–3.4 m/s). VO2max averaged 57 +/- 7 (SD) ml.min-1.kg-1, and peak lactate concentration during exercise averaged 22 +/- 2 mmol/l. The relationship between VO2 (ml.min-1.kg-1) and incline (INC) and speed (SP) [VO2 = 0.70(INC) + 13.95(SP) + 1.07(INC x SP) - 1.18] was linear (r2 = 0.94). Our findings suggest that most previous research used exercise intensities less than 60% VO2max and indicate the need for further research that examines the effect of exercise during pregnancy at levels greater than 60% VO2max.