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Marcos-Serrano M, Olcina G, Crespo C, et al. Urinary Steroid Profile in Ironman Triathletes. J Hum Kinet. 2018;61:109-117doi: 10.1515/hukin-2017-0130.
Marcos-Serrano, M., Olcina, G., Crespo, C., Brooks, D., & Timon, R. (2018). Urinary Steroid Profile in Ironman Triathletes. Journal of human kinetics, 61109-117. https://doi.org/10.1515/hukin-2017-0130
Marcos-Serrano, Marta, et al. "Urinary Steroid Profile in Ironman Triathletes." Journal of human kinetics vol. 61 (2018): 109-117. doi: https://doi.org/10.1515/hukin-2017-0130
Marcos-Serrano M, Olcina G, Crespo C, Brooks D, Timon R. Urinary Steroid Profile in Ironman Triathletes. J Hum Kinet. 2018 Mar 23;61:109-117. doi: 10.1515/hukin-2017-0130. eCollection 2018 Mar. PMID: 29599864; PMCID: PMC5873341.
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J Hum Kinet. 2018 Mar 23;61:109-117. doi: 10.1515/hukin-2017-0130. eCollection 2018 Mar.

Urinary Steroid Profile in Ironman Triathletes.

Journal of human kinetics

Marta Marcos-Serrano, Guillermo Olcina, Carmen Crespo, Darrell Brooks, Rafael Timon

Affiliations

  1. Department of Physical Education and Sport. Sports Science Faculty. University of Extremadura. Cáceres, Spain.
  2. Department of Physiology. Sports Science Faculty University of Extremadura. Cáceres, Spain.
  3. School of Pharmacy & Biomedical Sciences. University of Central Lancashire. Preston, United Kingdom.

PMID: 29599864 PMCID: PMC5873341 DOI: 10.1515/hukin-2017-0130

Abstract

The aim of this study was to determine variations in the urinary steroid profile of triathletes following an Ironman event. A total of 10 male participants (age = 36.0 ± 1.27 years; body height = 179.29 ± 10.77 cm; body mass = 74.50 ± 1.04 kg) completed an Ironman Championship. Urine samples were collected before, immediately after, and 24 hours following the race. Gas chromatography-mass spectrometry (GC/MS) was used to detect and quantify catabolic and anabolic hormones: Androsterone, Dehydroepiandrosteone (DHEA), Androstenedione and Testosterone (T), Betaestradiol, Estrone, Progesterone, Cortisol (C), Cortisone, Tetrahydrocortisol (THE) and Tetrahydrocortisone (THF). These were measured in their glucuroconjugated and free forms. Androsterone (3297.80 ± 756.83 vs. 2154.26 ± 1375.38), DHEA (47.80 ± 19.21 vs. 32.62 ± 15.96) and Beta-estradiol (59.36 ± 11.7 vs. 41.67 ± 10.59) levels decreased after the event. The significant decrease of DHEA (47.80 ± 19.21 vs. 32.11 ± 14.03) remained at 24 hours. Cortisol (200.38 ± 56.60 vs. 257.10 ± 74.00) and THE (238.65 ± 81.55 vs. 289.62 ± 77.13) increased after exercise and remained elevated 24 hours later (200.38 ± 56.60 vs. 252.48 ± 62.09; 238.65 ± 81.55 vs. 284.20 ± 66.66). The following anabolic/catabolic ratios fell after exercise: T/C (0.85 ± 0.54 vs. 0.54 ± 0.29), T/THE (0.66 ± 0.29 vs. 0.40 ± 0.08), T/THE+THF (0.38 ± 0.17 vs. 0.24 ± 0.06), DHEA/THE (0.22 ± 0.05 vs. 0.12 ± 0.05), DHEA/THF (0.34 ± 0.02 vs. 0.21 ± 0.01) and DHEA/THE+THF (0.12 ± 0.02 vs. 0.08 ± 0.03). The steroid profile showed that athletes were fatigued after finishing the competition and a catabolic state remained 24 hours later.

Keywords: gas chromatography-mass spectrometry; steroids; triathlon; urine

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