Metabolic recovery in professional road cyclists: A 31P-MRS Study

Hug F., Bendahan D., Le Fur Y., Cozzone P.J. and Grelot L. (2005) Metabolic recovery in professional road cyclists: A 31P-MRS Study. Medicine and Science in Sports and Exercise, 37 5: 846-852. doi:10.1249/01.MSS.0000162616.20085.B4


Author Hug F.
Bendahan D.
Le Fur Y.
Cozzone P.J.
Grelot L.
Title Metabolic recovery in professional road cyclists: A 31P-MRS Study
Journal name Medicine and Science in Sports and Exercise   Check publisher's open access policy
ISSN 0195-9131
Publication date 2005-01-01
Sub-type Article (original research)
DOI 10.1249/01.MSS.0000162616.20085.B4
Open Access Status Not Open Access
Volume 37
Issue 5
Start page 846
End page 852
Total pages 7
Subject 2739 Public Health, Environmental and Occupational Health
3612 Physical Therapy, Sports Therapy and Rehabilitation
2732 Orthopedics and Sports Medicine
Abstract Purpose: Aerobic training of professional road cyclists is linked to tremendous aerobic capacities that have never been clearly related to what occur in skeletal muscles submitted to a specific exercise. The aim of the present study was to examine specifically metabolic recovery after an incremental cycling exercise performed until exhaustion in professional road cyclists as compared with moderately trained subjects and so using 31P- MRS. Methods: Subjects performed a progressive cycling exercise on a cycloergometer until exhaustion, then they were positioned back in the magnet (delay lower than 45 s) for recovery scanning. 31P spectra of thigh muscles were time averaged in 2-s blocks at rest and for 15 min throughout the recovery period. Results: For a significantly more intense exercise (477 ± 28 vs 334 ± 24 W in controls; P < 0.001), professional road cyclists displayed similar end-of-exercise extrapolated pH values (6.43 ± 0.16 vs 6.34 ± 0.05 in controls) and a significantly higher PCr concentration (20.1 ± 0.8 vs 13.3 ± 0.5 mM in controls, P < 0.001). The pH recovery kinetics provided the evidence of metabolic adaptations related to a specific training in professional cyclists with a significantly faster rate (P < 0.01) of pH return toward basal values (32.8 ± 18.9 vs 10.8 ± 6.7 mM·min-1). On the contrary, no significant difference was measured for the PCr recovery kinetics. At rest, PDE concentration was significantly higher in professional cyclists (2.50 ± 0.80 vs 1.76 ± 0.42 mM), likely indicating a difference regarding fiber-type composition. Discussion: The present data demonstrated for the first time that the tremendous aerobic capacity in professional cyclists is linked to faster pH recovery kinetics after a specific cycling exercise. Copyright
Keyword Cycling
Elite cyclists
pH
Phosphocreatine
Phosphodiesters
Progressive exercise
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 23 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 23 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Thu, 06 Mar 2014, 06:09:12 EST by Francois Hug