<abstract xmlns="http://www.w3.org/1999/xhtml">

<italic>Study aim</italic>: To investigate the effect of a 2-week supplementation with <italic>Tribulus terrestris</italic> L. (<italic>TT</italic>) on the responses of testosterone, cortisol, and thyroid hormones including triiodothyronine (T3) and thyroxine (T4) following an intensive session of resistance exercise (RE).
<italic>Materials and methods</italic>: Twenty-two healthy non-athlete men (23.8 ± 3.1 years) participated in this study were divided into two groups and were randomly assigned to receive either <italic>TT</italic> supplementation (n = 11) or a placebo (n = 11). They consumed two 250-mg capsules with <italic>TT</italic> or placebo (maltodextrin) per day and performed six REs with the intensity 80-90% of 1RM on the fifteen day of the experiment. Venous blood samples were drawn before supplementation, and before and after the RE session.
<italic>Results</italic>: The mean values of post-exercise testosterone and cortisol in both groups were significantly higher than pre-exercise and baseline (<italic>p</italic> &lt; 0.01); however, there were no significant differences between the groups (<italic>p</italic> > 0.05). Likewise, despite a trend toward different levels of the responses of thyroid hormones with <italic>TT</italic> supplementation, there were no significant differences either in different time points or the groups (<italic>p</italic> > 0.05).
<italic>Conclusions</italic>: Short-term supplementation with <italic>TT</italic> appears to be ineffective in changing the hormonal responses measured in this study following a session of high-intensity RE.
</abstract>

Study aim: To investigate the effect of a 2-week supplementation with Tribulus terrestris L. (TT) on the responses of testosterone, cortisol, and thyroid hormones including triiodothyronine (T3) and thyroxine (T4) following an intensive session of resistance exercise (RE).
Materials and methods: Twenty-two healthy non-athlete men (23.8 ± 3.1 years) participated in this study were divided into two groups and were randomly assigned to receive either TT supplementation (n = 11) or a placebo (n = 11). They consumed two 250-mg capsules with TT or placebo (maltodextrin) per day and performed six REs with the intensity 80-90% of 1RM on the fifteen day of the experiment. Venous blood samples were drawn before supplementation, and before and after the RE session.
Results: The mean values of post-exercise testosterone and cortisol in both groups were significantly higher than pre-exercise and baseline (p < 0.01); however, there were no significant differences between the groups (p > 0.05). Likewise, despite a trend toward different levels of the responses of thyroid hormones with TT supplementation, there were no significant differences either in different time points or the groups (p > 0.05).
Conclusions: Short-term supplementation with TT appears to be ineffective in changing the hormonal responses measured in this study following a session of high-intensity RE.

Does <italic>Tribulus terrestris</italic> L. affect hormonal responses following high-intensity resistance exercise?

Department of Sport Sciences, Faculty of Humanities and Social Sciences

Department of Biochemistry and Pharmacogenomics, Faculty of Pharmacy

Biomedical Human Kinetics

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Does  L. affect hormonal responses following high-intensity resistance exercise?

Study aim: To investigate the effect of a 2-week supplementation with Tribulus terrestris L. (TT) on the responses of testosterone, cortisol, and thyroid hormones including triiodothyronine (T3) and thyroxine (T4) following an intensive session of resistance exercise (RE).
Materials and methods: Twenty-two healthy non-athlete men (23.8 ± 3.1 years) participated in this study were divided into two groups and were randomly assigned to receive either TT supplementation (n = 11) or a placebo (n = 11). They consumed two 250-mg capsules with TT or placebo (maltodextrin) per day and performed six REs with the intensity 80-90% of 1RM on the fifteen day of the experiment. Venous blood samples were drawn before supplementation, and before and after the RE session.
Results: The mean values of post-exercise testosterone and cortisol in both groups were significantly higher than pre-exercise and baseline (p  0.05). Likewise, despite a trend toward different levels of the responses of thyroid hormones with TT supplementation, there were no significant differences either in different time points or the groups (p > 0.05).
Conclusions: Short-term supplementation with TT appears to be ineffective in changing the hormonal responses measured in this study following a session of high-intensity RE.

Study aim: To investigate the effect of a 2-week supplementation with Tribulus terrestris L. (TT) on the responses of testosterone, cortisol, and thyroid...

Does Tribulus terrestris L. affect hormonal responses following high-intensity resistance exercise?

Published Online: May 06, 2022

Page range: 143 - 150

Received: Oct 18, 2021

Accepted: Jan 06, 2022

DOI: https://doi.org/10.2478/bhk-2022-0018

Keywords
Herbal Plant, Strength Exercise, Testosterone, Cortisol, Thyroid hormones

© 2022 Seyed Mojtaba Paydar Ardakani et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Does Tribulus terrestris L. affect hormonal responses following high-intensity resistance exercise?

Published Online: May 06, 2022

Page range: 143 - 150

Received: Oct 18, 2021

Accepted: Jan 06, 2022

DOI: https://doi.org/10.2478/bhk-2022-0018

KeywordsHerbal Plant, Strength Exercise, Testosterone, Cortisol, Thyroid hormones

© 2022 Seyed Mojtaba Paydar Ardakani et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Herbal Plant, Strength Exercise, Testosterone, Cortisol, Thyroid hormones