| Autor: |
de Diego Acosta AM; Escuela de Medicina de la Educación Física y el Deporte, Universidad de Málaga, Spain. amda@uma.es, García JC, Fernández-Pastor VJ, Perán S, Ruiz M, Guirado F |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of physiology and biochemistry [J Physiol Biochem] 2001 Dec; Vol. 57 (4), pp. 313-20. |
| DOI: |
10.1007/BF03179825 |
| Abstrakt: |
A group of trained and sedentary men performed an incremental graded exercise-test to exhaustion in order to assess the organic response of the two main stress-activated systems: the sympathetic nervous system with its endocrine component (the adrenal medulla), and the hypothalamic-pituitary-adrenal (HPA) axis. Maximal plasma concentrations of ACTH, cortisol and endogenous opioids (beta-endorphins) were obtained at the end of the exercise-test in the trained group. Thus ACTH increased from basal value of 21.25 +/- 2.5 pg/ml to 88.78 +/- 11.8 pg/ml at the end of the exercise (p<0.01); cortisol, from 16.56 microg/dl +/- 4.94 microg/dl to 23.80 +/- 4.57 microg/dl in min 15 of the recovery period (p<0.001); and beta-endorphin from 21.80 +/- 8.33 pmol/ml to 64.36 +/- 9.8 pmol/ml in min 3 of the recovery period (p<0.05). Catecholamine levels were increased from initial values at the end of the effort test in both control and trained groups. Control subjects exhibited a higher responsiveness compared to trained and showed superior intrinsic stimulation of the sympathetic nervous system. These results reveal a different response according to fitness in a physical stress situation. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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