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J Sports Med Phys Fitness. 2008 Dec;48(4):530-4.

Evaluation of urinary steroid profile in highly trained cyclists.

Author information

1
Department of Physical Education and Sport, Sport Sciences School, University of Extremadura, Cáceres, Spain. rtimon@unex.es

Abstract

AIM:

A regular and intense physical exercise significantly modifies hormonal metabolism and there are many reports of a change in urine steroid levels accompanying the practice of sport. The aim of this study was to compare the urinary steroid profile between highly trained cyclists and untrained subjects.

METHODS:

Urine levels of testosterone (T), epitestosterone (Epit), androstenedione, dehydroepiandrosterone (DHEA), androsterone (A), etiocholanolone (E), beta-estradiol (E2), estrone (E1) and the most abundant urine metabolites of cortisol and cortisone, tetrahydrocortisone (THE) and tetrahydrocortisol (THF) were determined by gas chromatography-mass spectrometry in urine samples from a group of professional cyclists (n=15) submitted to maximum level training for several years and compared with urine samples from sedentary subjects (n=15). The relationships between T/Epit, A+E/ THE, A+E/ THF, DHEA/THE and DHEA/THF were also studied.

RESULTS:

Cyclists showed lower urine levels of T, A, E and E2 and higher urine levels of androstenedione and E1 than sedentary individuals. A+E/THE and A+E/ THF ratios were higher in sedentary subjects than in cyclists.

CONCLUSION:

We conclude that cyclists showed a urinary steroid profile different from sedentary individuals, probably due to an adaptation to regular and intense physical training .

PMID:
18997659
[Indexed for MEDLINE]

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