ergo-log.com

Definition: "An ergogenic aid is any substance or phenomenon that enhances performance "

about us

/

contact

/

01.04.2018


This is the hormonal impact of a triathlon

The hormonal impact of a triathlon is less drastic than you might expect. If you rely on the concentration of hormones such as testosterone and cortisol in their urine, the recovery of triathletes is not fully completed after 24 hours, but has progressed considerably. Spanish sports scientists discovered this.

Study
The researchers, affiliated with the University of Extremadura, analyzed the urine of 10 experienced triathletes. The samples were taken just before, just after, and 24 hours after an Iron Man triathlon.

A triathlon consists of 3.8 kilometers of swimming, 180 kilometers of cycling and 42 kilometers of running.

Results
Right after the triathlon the concentration of DHEA in the body of the athletes was reduced; 24 hours later it was not yet back at the old level.


This is the hormonal impact of a triathlon


Right after the triathlon the testosterone level was lowered, but it recovered after 24 hours. That was remarkably fast, and the researchers did not expect that.


This is the hormonal impact of a triathlon


Right after the triathlon and a further 24 hours later the cortisol level was increased.


This is the hormonal impact of a triathlon


The ratio between cortisol and testosterone in the blood is the most important hormonal indicator of catabolism after physical exertion. Right after the triathlon, that ratio was significantly reduced. However, 24 hours later this was no longer the case.


This is the hormonal impact of a triathlon


"This research study had some limitations", the researchers acknowledge. "The small simple size of the study diminishes its power. Other biomarkers of muscle fatigue (such as creatine kinase [...] or total proteins) were not analysed, and could have supported the results."

"Moreover, the lack of plasma data makes it difficult to determine whether variations in urinary excretion of steroid hormones were the result of changes in the steroid synthesis or changes in the use of these steroids by muscles."

Conclusion
"Based on the reduction of urine androgen and increase of urine corticosteroid concentrations, it may be concluded that the participants were in a catabolic state after the Ironman triathlon", write the researchers. "More than 24 hours is needed to restore the steroid hormonal balance."

"These results should be taken into account when evaluating athletes recovery periods and establishing the time required before beginning intensive training sessions."

Source:
J Hum Kinet. 2018 Mar 23;61:109-17.

More:
Betalains, the red colour in beetroot and amaranth, make triathletes faster 06.04.2017
Pycnogenol aids triathlon training 20.04.2014
Caffeine, not pseudoephedrine, makes triathletes faster 26.01.2014

Archives:
Endurance Training


Long-term rise in testosterone levels as a result of cryotherapy after explosive training
Athletes who spend a few minutes in an extremely cold cryochamber after doing an explosive training session synthesise more testosterone for a long period than athletes who do not do cryotherapy.

Meditate for less cortisol, more testosterone and growth hormone after training
But please don't meditate during your training.

Low carb + endurance training = fall in testosterone levels
Trained athletes who a) cycle hard for an hour a day and b) eat little carbohydrate produce less testosterone and more cortisol. Researchers didn't take adaption phase into account.