Increase of circulating beta-endorphin-like immunoreactivity correlates with the change in feeling of pleasantness after running.
Twenty-one male regular long distance runners participated in two 10 km runs one week apart. Their beta-endorphin-like immunoreactivity (beta-EIR) was assayed in plasma before and immediately after running. Mood was monitored by an adjective check list (Eigenschaftswörterliste, EWL) pre- and post-run. beta-EIR was significantly elevated post-run. Self-reliance and good mood scored higher after running. Both mood elevation and plasma beta-EIR increase showed a considerable individual variability but there was a significant correlation in the mean values of the two runs between individual beta-EIR increases (delta beta-EIR) and the changes of ratings in feeling of pleasantness (delta FP). High delta beta-EIR corresponded to positive mood change post-run.
D000328:Adult; D004644:Emotions / Q000502:physiology*; D004723:Endorphins / Q000097:blood*; D006801:Humans; D008297:Male; D012420:Running; D001615:beta-Endorphin
D004723:Endorphins; D001615:beta-Endorphin