Exercise and the Stress System

George Mastorakos, Maria Pavlatou, Evanthia Diamanti-Kandarakis, George P. Chrousos

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Exercise represents a physical stress that challenges homeostasis. In response to this stressor, autonomic nervous system and the hypothalamic-pituitary-adrenal axis are known to react and to participate in the maintenance of homeostasis. This includes elevation of cortisol and cathecholamines in plasma. However, sustained physical conditioning in highly trained athletes is associated…

Salivary testosterone responses to a physical and psychological stimulus and subsequent effects on physical performance in healthy adults

Blair T. Crewther, Liam P. Kilduff, Charlie Finn, Phil Scott, Christian J. Cook

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OBJECTIVE: To address the rapid influence of testosterone (T) on neuromuscular performance, we compared the T and physical performance responses of adults exposed to a physical and psychological stimulus. DESIGN: A group of healthy men (n=12) and women (n=14) each completed three treatments using a randomised, crossover design: exercise involving five × ten-second cycle sprints, viewing a video clip with aggressive content and a control session …

Removal of a high-fat diet, but not voluntary exercise, reverses obesity and diabetic-like symptoms in male C57BL/6J mice

Aikaterini Hatzidis, Jasmin A. Hicks, Rachel R. Gelineau, Nicole L. Arruda, Isabella Monteiro De Pina, Karyn E. O’Connell, Joseph A. Seggio

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OBJECTIVE: Both the consumption of high-fat diets and exercise are known to produce alterations in metabolism and behavior. This study focuses on the effects of a change to a low-fat diet from a high-fat diet and voluntary exercise on obesity, type-2 diabetic-like symptoms, and locomotor behavior in male C57BL/6J mice. DESIGN: Mice were initially given either a high-fat diet or regular chow, along with a cage …