Abstract
To the Editor: We read with great interest the paper by Carr et al. in the September 3 issue1 on the relation between exercise and β-endorphin secretion in women. We have previously reported a study in which five untrained subjects (four men and one woman) 26 to 35 years old ran for 20 minutes on a treadmill at a speed that was adjusted to maintain the heart rate at 80 per cent of maximum.2 Plasma samples were obtained before and after exercise, and β-endorphin immunoreactivity was measured by radioimmunoassay. There was a 440 per cent mean increase in circulating β-endorphin.
Original language | English (US) |
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Pages (from-to) | 1590-1592 |
Number of pages | 3 |
Journal | New England Journal of Medicine |
Volume | 305 |
Issue number | 26 |
DOIs | |
State | Published - Dec 24 1981 |
ASJC Scopus subject areas
- Medicine(all)