Changes in blood markers of serotoninergic activity following high intensity cycle ergometer exercise

J.S. Baker, R. Morgan, D. Hullin, L.M. Castell, D.M. Bailey, B. Davies

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3 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)191-203
Number of pages13
JournalResearch in Sports Medicine
Issue number3
Publication statusPublished - 23 Sep 2006
Externally publishedYes



  • high intensity exercise
  • prolactin
  • tryptophan

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