Can All-Out sprints reshape the Thyroid's response?
NCT ID NCT07765290
First seen Aug 14, 2026 · Last updated Aug 14, 2026
Summary
This study looks at whether a short burst of very intense exercise—repeated Wingate cycling sprints—can change levels of thyroid hormones in the blood. Twenty healthy male amateur soccer players, aged 19 to 22, will have blood drawn right before and right after the exercise to measure free T3, free T4, and TSH. The goal is to see how the thyroid responds to high-intensity anaerobic effort and what that might mean for exercise physiology.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Repeated Wingate exercise (a series of high-intensity cycling sprints)
- What this could lead to
- If intense exercise reliably shifts thyroid hormone levels, this could help tailor training and recovery strategies for athletes and deepen understanding of how the body responds to anaerobic effort.
- What could go wrong
- This is a small, single-arm study in a narrow group (young male soccer players), so findings may not apply to other populations. It measures short-term hormone changes, not long-term effects or performance outcomes.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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20 people
The number who actually took part.
- Started
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Jun 2023
- Finished
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Jun 2023
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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19 to 22 years
- Sex
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Male participants only
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: - Male amateur soccer players. * Age between 19 and 22 years. * Apparently healthy and free from acute or chronic disease. * Regular participation in amateur soccer training. * Willingness to participate and provision of written informed consent. Exclusion Criteria: - History of thyroid disease or endocrine disorders. * Current use of medications or supplements known to affect thyroid function or hormonal responses. * Acute illness or musculoskeletal injury at the time of testing. * Failure to complete the repeated Wingate exercise protocol or all required blood sample collections.
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Exercise Physiology Laboratory, Faculty of Sport Sciences, Karabuk University
Karabük, Karabük Province, 78050, Turkey (Türkiye)
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