BLOOD CORTISOL LEVELS RESPONSES TO A LABORATORY EXERTION AND PRE-COMPETITION STRESS AMONG ELITE SWIMMERS
Journal Title: Medycyna Sportowa - Year 2008, Vol 24, Issue 6
Abstract
[b]Background.[/b] This study aimed to compare adrenocortial responses to two various stimuli: maximal, routine laboratory exertion and pre-competition stress, with respect to gender and to physical fitness.[b]Material and methods.[/b] 16 males, aged 17±2.0 y. and 15 females, aged 15.3±1.6 y, non-users of oral contraceptive were examined on two separated days. During first examination athletes underwent laboratory, incremental exercise test until volitional exhaustion. This test was coupled with capillary blood sampled the morning, pre- and post-exertion. During competition day (Polish Swimming Championships) capillary blood were taken at the two time points, prior to series of eliminations and next prior to series of finals taking place before the noon and in the afternoon respectively. Plasma cartisol and blood lactate was determined in all samples.[b]Results.[/b] On the day of laboratory studies end-test cortisol was significantly (p<0.01) higher in the male group, whereas during competition females exhibited higher (p<0.01) cortisol levels prior elimination and finals. In both sexes pre-competition events were characterized by significantly (p<0.05) higher cortisol levels compared to those observed before and after laboratory exercise test. Cortisol levels during laboratory task or prior to competition were not related to physical fitness. Positive correlations were found between cortisol levels determined before elimination and finals, r=0.558 in females and r=0.602 in males.[b]Conclusions.[/b] Considering behavior of blood cortisol levels prior to compertition as a marker of arousal, we may assume that female swimmers were more susceptible to anticipatory stress.
Authors and Affiliations
Zbigniew Obmiński, Andrzej Klusiewicz
Keywords
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