Spaaij C J, van Raaij J M, de Groot L C, van der Heijden L J, Boekholt H A, Hautvast J G
Department of Human Nutrition, Wageningen Agricultural University, The Netherlands.
Eur J Clin Nutr. 1994 Jul;48(7):513-21.
To investigate whether work efficiency improves during pregnancy.
Longitudinal; energy expenditure measurements (ventilated hood system) before the onset of pregnancy and in weeks 13, 24 and 35 of gestation.
Healthy Dutch women (n = 26), recruited with advertisements in local newspapers and posters displayed in public buildings.
Resting metabolic rate (RMR); metabolic rate during cycling at workloads of 30, 45, 60 and 75 W (CMRgross); post-cycling metabolic rate (PCMRgross); net energy costs of cycling (CMRnet = CMRgross - RMR); net recovery costs after cycling exercise (PCMRnet = PCMRgross - RMR).
RMR, CMRgross and PCMRgross increased during pregnancy; under all conditions, metabolic rates were 0.9 kJ/min higher at 35 weeks gestation than before pregnancy (P < 0.05). CMRnet and PCMRnet showed no significant change during gestation.
Changes in metabolic rate during cycling exercise suggest that pregnancy does not induce an improvement of work efficiency.
研究孕期工作效率是否提高。
纵向研究；在怀孕前以及妊娠第13、24和35周测量能量消耗（通风橱系统）。
通过在当地报纸上刊登广告以及在公共建筑张贴海报招募的健康荷兰女性（n = 26）。
静息代谢率（RMR）；在30、45、60和75瓦工作负荷下骑行时的代谢率（CMRgross）；骑行后代谢率（PCMRgross）；骑行的净能量消耗（CMRnet = CMRgross - RMR）；骑行运动后的净恢复消耗（PCMRnet = PCMRgross - RMR）。
孕期RMR、CMRgross和PCMRgross升高；在所有条件下，妊娠35周时的代谢率比怀孕前高0.9 kJ/分钟（P < 0.05）。CMRnet和PCMRnet在孕期无显著变化。
骑行运动期间代谢率的变化表明，怀孕不会提高工作效率。
