Changes in blood markers of serotoninergic activity following high intensity cycle ergometer exercise.
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.
Baker
J S
JS
Health and Exercise Science Research Laboratory, School of Applied Science, University of Glamorgan, Pontypridd, Wales, United Kingdom. jsbaker@glam.ac.uk
Morgan
R
R
Hullin
D
D
Castell
L M
LM
Bailey
D M
DM
Davies
B
B
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
D015415:Biomarkers; D005230:Fatty Acids, Nonesterified; D019344:Lactic Acid; D014364:Tryptophan; D011388:Prolactin; D009638:Norepinephrine; D004837:Epinephrine