title: Changes in blood markers of serotoninergic activity following high intensity cycle ergometer exercise.
abstract: The purpose of this study was to measure concentrations of adrenaline (A), noradrenaline (NE), free tryptophan (f-Trp), prolactin (PRL), nonesterified fatty acids (NEFA), and blood lactate following 30 s of high-intensity cycle ergometer exercise. Adrenaline (A) and NE concentrations increased immediately postexercise (P < 0.05) and returned to levels observed at baseline 24 h later. Plasma f-Trp concentration decreased by 23.5% immediately following exercise (P < 0.05). There were no changes observed in serum concentrations of PRL. Plasma NEFA concentrations decreased immediately following exercise by 46% (P < 0.05) and returned to baseline values 24 h later. Whole blood lactate concentrations increased immediately post exercise (P < 0.05), and were higher than those measured 24 h later (P < 0.05). These findings indicate that blood markers of serotoninergic activity were unaltered by a single 30 s bout of maximal cycling.
authors.affiliation: Health and Exercise Science Research Laboratory, School of Applied Science, University of Glamorgan, Pontypridd, Wales, United Kingdom. jsbaker@glam.ac.uk
authors.forename: J S
authors.initials: JS
authors.lastname: Baker
authors.forename: R
authors.initials: R
authors.lastname: Morgan
authors.forename: D
authors.initials: D
authors.lastname: Hullin
authors.forename: L M
authors.initials: LM
authors.lastname: Castell
authors.forename: D M
authors.initials: DM
authors.lastname: Bailey
authors.forename: B
authors.initials: B
authors.lastname: Davies
mesh_terms: D000328:Adult; D015415:Biomarkers / Q000097:blood; D004837:Epinephrine / Q000097:blood; D016552:Ergometry; D005230:Fatty Acids, Nonesterified / Q000097:blood; D006801:Humans; D019344:Lactic Acid / Q000097:blood; D008297:Male; D009638:Norepinephrine / Q000097:blood; D010807:Physical Endurance; D011388:Prolactin / Q000097:blood; D014364:Tryptophan / Q000097:blood
chemical_list: D015415:Biomarkers; D005230:Fatty Acids, Nonesterified; D019344:Lactic Acid; D014364:Tryptophan; D011388:Prolactin; D009638:Norepinephrine; D004837:Epinephrine