Research Article
Beta endorphin: a factor in "fun run" collapse?
Br Med J (Clin Res Ed) 1987; 294 doi: https://doi.org/10.1136/bmj.294.6578.1004 (Published 18 April 1987) Cite this as: Br Med J (Clin Res Ed) 1987;294:1004Article usage
Article metrics provide readers and authors with an indication of how often a specific article has been accessed month by month. It counts three formats - abstract/extract, full text and pdf. The page is updated each day.