Abstract
We describe the metabolic changes in the blood that appeared during
a maximal 400-m swimming test in 7 male swimmers by Fourier-transform infrared
spectrometry (FT-IR spectrometry). A 400-m test
(255.9 ± 6.8 s) was performed during which stroke
frequency and time to complete each pool distance were recorded. In three other
tests, the first 100 m, 200 m, and 300 m were swam at the
same stroke frequency and velocity. Capillary blood samples were taken at rest
and after tests to analyze change in plasma contents by FT-IR spectrometry.
Best swimmers were characterized by higher glycemia increase at the onset of
exercise (r = -0.91; p < 0.01). Lactate
increase was also higher after 300 m (r = -0.97;
p < 0.01). Higher amounts of fatty acids were also available
at the end of exercise, as assessed by the relationships found between swimming
velocity and concentrations of albumin (r = 0.96;
p < 0.01), apolipoprotein C3
(r = 0.93; p < 0.01), triglycerides
(r = -0.81; p < 0.05), and fatty acids
(r = 0.97; p < 0.01). This metabolic
response allowed the best swimmers to maintain longer their initial swimming
velocity. The best swimmers presented also higher amino-acid concentration
increase during exercise (r = 0.91;
p < 0.01). Therefore, performance competence originated
probably from better regulation in carbohydrate, lipid, and amino-acid
metabolism.
Key words
Performance - triglycerides - apolipoproteins - fatty acids - carbohydrates - amino acids
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Dr. C. Petibois
INSERM U443 · Groupe de Chimie Bio-Organique
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