PMID: 9189307Jun 1, 1997Paper

Effect of exercise intensity on free tryptophan to branched-chain amino acids ratio and plasma prolactin during endurance exercise

Canadian Journal of Applied Physiology = Revue Canadienne De Physiologie Appliquée
H K StrüderK Weber

Abstract

The potential of exercise-induced changes in peripheral amino acids to alter blood prolactin levels through a serotonergic system modification was investigated in 8 male athletes. In two trials, subjects (N = 8) exercised on a cycle ergometer for 5 hr. The intensity of exercise corresponded to 55% VO2max (T55) or 75% VO2max (T75), respectively. In each trial, each subject received a 25-g energy bar (111 kcal) every 60 min, as well as 300 ml of a 6% carbohydrate solution (90 kcal) every 30 min of exercise duration. Plasma glucose and insulin declined (p < or = .05) in both trials during exercise. Ammonia was augmented (p < or = .05) above the baseline concentration after 120 min in both trials. During the last 2 hr of exercise, plasma free fatty acids were higher (p < or = .05) in T75 than in T55. During this time, the plasma free TRP/BCAA ratio was also augmented (p < or = .05) in T75, while no change was induced in T55. Plasma prolactin did not change in T55, while an increase (p < or = .05) was found in T75. The findings may further support the hypothesis that during endurance exercise changes in peripheral amino acid concentration may influence prolactin response via serotonergic system modifications.

Citations

Feb 21, 2007·European Journal of Applied Physiology·Adriana C Levada-PiresTania Cristina Pithon-Curi
Jul 25, 2000·Nutrition·W Hollmann, H K Strüder
May 6, 2003·European Neuropsychopharmacology : the Journal of the European College of Neuropsychopharmacology·Andreas BroocksB Bandelow
May 31, 2014·European Child & Adolescent Psychiatry·Roseriet BeijersCarolina de Weerth
Dec 27, 2011·Complementary Therapies in Clinical Practice·Tiffany Field
May 18, 2010·Infant Behavior & Development·Tiffany FieldMaria Hernandez-Reif
Feb 19, 2008·Infant Behavior & Development·Tiffany FieldCynthia Kuhn
Dec 14, 2011·Journal of Neuroendocrinology·S Rojas VegaH K Strüder
May 15, 2004·Progress in Neurobiology·Lars Nybo, Niels H Secher
Jun 23, 2012·Infant Behavior & Development·Tiffany Field
Jan 12, 1999·Frontiers in Neuroendocrinology·L D Van de Kar, M L Blair
Dec 17, 2008·Journal of Psychopharmacology·A A-B Badawy
Nov 30, 2012·Genes, Brain, and Behavior·A V WilkinsonM R Spitz
Aug 7, 2014·American Journal of Physiology. Endocrinology and Metabolism·Jonathan M PeakeDavid Cameron-Smith
Sep 8, 1998·Journal of Applied Physiology·J W FarrisD L Thompson
May 20, 2003·Journal of Applied Physiology·Lars NyboNiels Secher
Jan 21, 2006·The Journal of Nutrition·Eva Blomstrand
Apr 4, 2021·Animals : an Open Access Journal From MDPI·Francesca ArfusoGiuseppe Piccione

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