ADRENOCORTIAL RESPONSES TO EXHAUSTING LABORATORY EXPERTION IN ENDURANCE-TRAINED ATHLETES
Journal Title: Medycyna Sportowa - Year 2008, Vol 24, Issue 2
Abstract
[b]Background. [/b]The aim of the study was to examine anticipation of an exhausting laboratory test and post-exertion biological responses in endurance-trained athletes.[b]Material and methods. [/b]Orienteers, 14 females aged 18.4+/-1.5 y. and 18 males aged 19.0+/-1.3 y. underwent incremental graded exertion on treadmill untill volitional exhaustion. Capillary blood was sampled in the morning, at 8:00, 10 minutes prior to the test, and within 3 and 30 minutes of post-test recovery. Pre-test blood was sampled before noon; 10:00-12:00 a. m. Plasma cortisol in all samples was determined with using commercial ELISA kit (IBL, Germany. Blood lactate at 3 minute following the test was measured using DrLange kit (Germany).[b]Results. [/b]The mean value of morning plasma cortisol level was similar in females (487+/-67 nmol/L) and males (483+/-112 nmol/L). Pre-test mean plasma cortisol level was higher by 36% in females than in males. During post-test recovery, plasma cortisol was elevating gradually in both sexes, reached maximium values within +30 minute, 767+/-242 in females and 576+/-108 nmol/L in males and was significantly higher in comparison to those pre-event values. Post-exertion mean blood lactate level was significantly (p<0.05) higher in females (12.1+/-2.1) compared to that in males (10.8+/-2.1 mmol/L).[b]Conclusions. [/b]Based on cortisol measurements we may conclude, that female orienteers stronger responded to anticipatory stress and to exhausting laboratory exercise test.
Authors and Affiliations
Zbigniew Obmiński, Maria Ładyga, Konrad Witek
Keywords
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