European Journal of Applied Physiology

, Volume 106, Issue 3, pp 465–471

The relationship between monocarboxylate transporters 1 and 4 expression in skeletal muscle and endurance performance in athletes

  • David J. Bentley
  • Belle Roels
  • Claire Thomas
  • Robert Ives
  • Jacques Mercier
  • Grégoire Millet
  • David Cameron-Smith
Original Article

DOI: 10.1007/s00421-009-1034-5

Cite this article as:
Bentley, D.J., Roels, B., Thomas, C. et al. Eur J Appl Physiol (2009) 106: 465. doi:10.1007/s00421-009-1034-5

Abstract

The purpose of this study was to examine the relationship between skeletal muscle monocarboxylate transporters 1 and 4 (MCT1 and MCT4) expression, skeletal muscle oxidative capacity and endurance performance in trained cyclists. Ten well-trained cyclists (mean ± SD; age 24.4 ± 2.8 years, body mass 73.2 ± 8.3 kg, VO2max 58 ± 7 ml kg−1 min−1) completed three endurance performance tasks [incremental exercise test to exhaustion, 2 and 10 min time trial (TT)]. In addition, a muscle biopsy sample from the vastus lateralis muscle was analysed for MCT1 and MCT4 expression levels together with the activity of citrate synthase (CS) and 3-hydroxyacyl-CoA dehydrogenase (HAD). There was a tendency for VO2max and peak power output obtained in the incremental exercise test to be correlated with MCT1 (r = −0.71 to −0.74; P < 0.06), but not MCT4. The average power output (Paverage) in the 2 min TT was significantly correlated with MCT4 (r = −0.74; P < 0.05) and HAD (r = −0.92; P < 0.01). The Paverage in the 10 min TT was only correlated with CS activity (r = 0.68; P < 0.05). These results indicate the relationship between MCT1 and MCT4 as well as cycle TT performance may be influenced by the length and intensity of the task.

Keywords

AerobicCyclingPowerRegulationCorrelation

Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • David J. Bentley
    • 1
  • Belle Roels
    • 2
    • 3
  • Claire Thomas
    • 3
    • 4
  • Robert Ives
    • 1
  • Jacques Mercier
    • 3
    • 5
  • Grégoire Millet
    • 6
  • David Cameron-Smith
    • 7
  1. 1.Health and Exercise Science, School of Medical ScienceUniversity of New South WalesSydneyAustralia
  2. 2.UPRES EA 3759 “Multidisciplinary Approach of Doping”MontpellierFrance
  3. 3.UFR Médecine, EA701Université Montpellier 1MontpellierFrance
  4. 4.STAPS Department, UFR des Sciences Fondamentales et AppliqueesUniversity of Evry Val D’EssonneEvryFrance
  5. 5.INSERM, ERI 25MontpellierFrance
  6. 6.Institut des sciences du sport et de l’éducation physiqueUniversité de LausanneLausanneSwitzerland
  7. 7.School of Nutrition and Exercise SciencesDeakin UniversityMelbourneAustralia