Cockerels were exercised to observe the influence of physical activity on plasma corticosterone concentrations. The birds were maintained on a commercial mash or on an atherogenic diet. Plasmas were collected on the first day, fifteen days after the first collection and immediately after a 20 minute run on that fifteenth day. The plasma corticosterone levels as determined by radioimmunoassay showed extreme variations within collections. Hence, the data analysis indicated no significant changes of the Compound β in the blood of the cockerels due to diet, or exercise or the combination of both. The causes for the wide variation of plasma corticosterone levels in these birds remain unknown.
David, Stanley N. and David, Clarene L.
"Plasma Corticosterone Levels in Cholesterol-fed Cockerels Before and After a Twenty Minute Run,"
Journal of the Arkansas Academy of Science: Vol. 40
, Article 9.
Available at: http://scholarworks.uark.edu/jaas/vol40/iss1/9