Influence of a Maximal Incremental Test Until Exhaustion on the Urinary Excretion of Steroid Hormones in Trained Cyclists.

 Article (PDF) 
Authors
Victor Toro-Roman, Diego Munoz, Jesus Siquier-Coll, Ignacio Bartolome, Maria Concepcion Robles, Marcos Maynar-Marino
Abstract

This study aimed to assess the effect of a maximum incremental stress test through urinary concentrations of steroid hormones in trained cyclists. Twenty male cyclists participated in the study (23.83 ± 2.3 years; 1.76 ± 0.03 m; 66.94 ± 3.59 kg; training volume: 20.50 ± 2.35 h/week). Athletes performed a maximum incremental test until exhaustion on a cycle ergometer and urine samples were collected at three different time points: before, immediately after, and 48 h after the test. Lactate, creatinine and urinary concentrations of testicular and adrenal androgens were obtained as well as urinary concentrations of glucocorticoid hormones. An increase in lactate was observed after the test (p < 0.01). There were decreases in the urinary excretion of androgenic hormones after the test, which were significant in testosterone, androsterone, androstenedione, total adrenal androgen and total testicular androgen (p < 0.05). The values were restored after 48 h (p < 0.05). Urinary cortisol concentrations decreased after the test (p < 0.05). A decrease was also observed in the ratio of anabolic/catabolic hormones (p < 0.05) increasing 48 h after the test (p < 0.05). Increased acute physical exercise until exhaustion causes variations in the urinary excretions of steroid hormones which were restored 48 h after exercise. Urinary excretion of steroid hormones could be a valid method of monitoring training loads.
DOI
DOI: 10.2478/hukin-2021-0033
Citation
 APA 
Toro-Román, V., Muñoz, D., Siquier-Coll, J., Bartolomé, I., Robles, M. C., Maynar-Mariño, M. (2021). Influence of a Maximal Incremental Test Until Exhaustion on the Urinary Excretion of Steroid Hormones in Trained Cyclists. Journal of Human Kinetics, 78, 121-129. https://doi.org/10.2478/hukin-2021-0033
 Harvard 
Toro-Román, V., Muñoz, D., Siquier-Coll, J., Bartolomé, I., Robles, M. C., and Maynar-Mariño, M. (2021). Influence of a Maximal Incremental Test Until Exhaustion on the Urinary Excretion of Steroid Hormones in Trained Cyclists. Journal of Human Kinetics, 78, pp.121-129. https://doi.org/10.2478/hukin-2021-0033
 MLA 
Toro-Román, Víctor et al. “Influence of a Maximal Incremental Test Until Exhaustion on the Urinary Excretion of Steroid Hormones in Trained Cyclists.” Journal of Human Kinetics, vol. 78, 2021, pp. 121-129. doi:10.2478/hukin-2021-0033.
 Vancouver 
Toro-Román V, Muñoz D, Siquier-Coll J, Bartolomé I, Robles MC, Maynar-Mariño M. Influence of a Maximal Incremental Test Until Exhaustion on the Urinary Excretion of Steroid Hormones in Trained Cyclists. Journal of Human Kinetics. 2021;78:121-129. https://doi.org/10.2478/hukin-2021-0033
Key words
exercise, androgens, glucocorticoids, stress, recovery

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