Abstract
We studied the effects of a twelve months endurance-training program
on exercise-induced change in blood contents in thirteen rowers. A standardized
testing-session (18 km rowing at 80 % of
V˙O2max) was performed 19 times during the training program.
Capillary blood samples were taken at rest and immediately post-exercise to
analyse a wide range of serum concentrations. During exercise, glucose and
lactate concentrations stabilized after only five training weeks and did not
evolve from that point. Transport and hepatic protein concentrations increased
with exercise up to the 15th week (p = 0.03), and remained
stable from that point (p = 0.02). Evolution of
exercise-induced change in α1-acid glycoprotein concentration
revealed protein metabolism adaptations to training. Change in
α1-acid glycoprotein concentrations were exactly opposite to
that of urea and α1-antitrypsin (p = 0.01
and 0.002, respectively). Immunoglobulin concentrations exhibited important
increases up to the 6th training week (p < 0.05), and a global
stabilization was observed from that point. However, analysis of IgG subclasses
highlighted significant changes that could not be found with the study of total
IgG concentrations. Evolution of the exercise-induced change in
Apo-A1/Apo-B concentrations ratio was also more informative about
lipid metabolism than the Apo-A1 and Apo-B concentrations taken
individually. Indeed, evolution of metabolic changes during exercise should be
carefully monitored during training to avoid interpretative errors on the
training status of athlete.
Key words
Metabolism - proteins - immunoglobulins - apolipoproteins - biological adaptations
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Prof. G. Déléris
Université Victor Segalen · Bordeaux 2 ·
INSERM U443 · Groupe de Chimie Bio-Organique
146 Rue Léo Saignat · 33 076 Bordeaux ·
France ·
Telefon: +33 (557) 571002
Fax: +33 (557) 571002
eMail: gerard.deleris@u-bordeaux2.fr
