12:
Training responses of plasma beta-endorphin, adrenocorticotropin, and cortisol.
Kraemer WJ, Fleck SJ, Callister R, Shealy M, Dudley GA, Maresh CM, Marchitelli L, Cruthirds C, Murray T, Falkel JE.
Med Sci Sports Exerc. 1989 Apr;21(2):146-53.
PMID: 2540392 [PubMed - indexed for MEDLINE]
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