| Abstrakt: |
The effect of physical exercise on β-endorphin (β-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 nonpregnant women the mean β-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 β-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 β-E secretion increased in response to exercise both in non-pregnant and in pregnant women, the response lasting longer in pregnant women. |
