Rauramo I, Salminen K, Laatikainen T
Acta Obstet Gynecol Scand. 1986;65(6):609-12. doi: 10.3109/00016348609158397.
The effect of physical exercise on beta-endorphin (beta-E) concentration in plasma was studied in 8 non-pregnant and in 8 pregnant women in their last trimester of pregnancy, using a 10-min bicycle ergometer test. In the non-pregnant women the mean beta-E levels were 2.4 +/- 0.7 (S.E.) pmol/l before the test, 4.3 +/- 0.9 pmol/l at the end of the test, and 4.3 +/- 0.6 and 5.0 +/- 2.0 pmol/l 15 and 30 min after the test, respectively, declining thereafter. In the pregnant women the mean beta-E values were 5.1 +/- 2.0 pmol/l before the test, 7.3 +/- 1.7 pmol/l at the end of the test, 6.7 +/- 2.0 pmol/l 15 min after the test, and 12.6 +/- 4.1 pmol/l 60 min after the test, declining thereafter. Thus, beta-E secretion increased in response to exercise both in non-pregnant and in pregnant women, the response lasting longer in pregnant women.
采用10分钟自行车测力计测试，对8名未怀孕女性和8名妊娠晚期孕妇进行了体育锻炼对血浆β-内啡肽（β-E）浓度影响的研究。在未怀孕女性中，测试前β-E平均水平为2.4±0.7（标准误）pmol/l，测试结束时为4.3±0.9 pmol/l，测试后15分钟和30分钟分别为4.3±0.6和5.0±2.0 pmol/l，之后下降。在孕妇中，测试前β-E平均水平为5.1±2.0 pmol/l，测试结束时为7.3±1.7 pmol/l，测试后15分钟为6.7±2.0 pmol/l，测试后60分钟为12.6±4.1 pmol/l，之后下降。因此，未怀孕女性和孕妇的β-E分泌均因运动而增加，且孕妇的反应持续时间更长。
