PMID: 8954292Jan 1, 1996Paper

Effect of O2 availability on neuroendocrine variables at rest and during exercise: O2 breathing increases plasma prolactin

European Journal of Applied Physiology and Occupational Physiology
H K StrüderK Weber

Abstract

Neuroendrocrine and substrate responses were investigated in eight male athletes during inhalation of either 100% O2 (HE), 14% O2 (HO) or normoxio gas (NO) before, during and after 60 min of cycle ergometry at the same absolute work rate. Concentrations of prolactin (PRL), growth hormone (GH), testosterone (T), adrenocorticotropic hormone (ACTH), cortisol (COR), adrenalin (A), noradrenalin (NA), insulin (INS), ammonia (NH3), free fatty acids, serotonin (5-HT), total protein, branched-chain amino acids (BCAA) and free tryptophan (free TRP) were determined in venous blood and lactate concentration [LA-], partial pressure of oxygen (PO2), oxygen saturation (SO2), partial pressure of carbon dioxide and pH in capillary blood. The PO2 and SO2 were augmented in HE and decreased in HO (P < or = 0.01). In HO and NO no significant changes were found for any other parameter during 30 min of rest prior to exercise. In HE, PRL increased by about 400% during this time, while NA declined (P < or = 0.01). Heart rate (HR) and [LA-] were higher during exercise in HO (P < or = 0.01). In all trials, NH3, NA, A, T, GH and ACTH increased during exercise (P < or = 0.01), while BCAA and INS declined. In comparison to NO and HE, increases of NA, A, GH,...Continue Reading

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Citations

Oct 12, 2012·European Journal of Applied Physiology·Stefanie SchulteHeiko K Strüder
Sep 25, 2010·Sleep & Breathing = Schlaf & Atmung·Busarakumtragul PanareeNeruntarat Chairat
Mar 27, 2004·American Journal of Respiratory and Critical Care Medicine·Kerstin M OltmannsAchim Peters
Dec 12, 2002·Chest·Tarja Saaresranta, Olli Polo
Feb 11, 2010·Biological Psychology·James L AbelsonNicholas Giardino
Dec 14, 2011·Journal of Neuroendocrinology·S Rojas VegaH K Strüder
Aug 1, 2016·Sports Medicine·Billy SperlichJennifer Wegrzyk
Feb 6, 2003·Medicine and Science in Sports and Exercise·Andreas Michael NiessHans-Hermann Dickhuth
Apr 7, 1999·Acta Physiologica Scandinavica·H K StrüderK Weber

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