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Authors C Petibois, G Deleris
Title   Erythrocyte adaptation to oxidative stress in endurance training
Full source     Archives of Medical Research, 2005, Vol 36, Iss 5, pp 524-531

Background. We tested the hypothesis that endurance training may reduce 
exercise oxidative stress damage on erythrocytes. Methods. Fifteen subjects 
performed a standardized endurance exercise at 75% of maximal oxygen 
consumption weekly during a 19-week training period. Blood samples taken before 
and after exercise were analyzed by Fourier transform-infrared (FT-IR) 
spectrometry to determine exercise-induced change in plasma concentrations and 
erythrocyte IR absorptions. Results. Training first induced a stabilization of 
plasma concentration changes during exercise (unchanged for glucose, increased 
for lactate, triglycerides, glycerol, and fatty acids), whereas erythrocyte 
phospholipid alterations remained elevated (p <0.05). Further, training reduced 
the exercise-induced erythrocyte lactate content increase (vC-O; p <0.05) and 
phospholipid alterations (vC-H-n, and vP = O; p <0.05) during exercise. These 
changes paralleled the decrease of exercise-induced hemoconcentration (P <0.05) 
and plasma lactate increase (p <0.05). Conclusions. These correlated changes 
between plasma and erythrocyte parameters suggest that endurance training 
reduces erythrocyte susceptibility to oxidative stress.


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