Clinical trial Recruiting at 1 site Interventional Ages 18 to 40 Men only

Investigating how testosterone affects muscle growth and memory

Official title: Long-term Effects of Anabolic Androgenic Steroids on Muscle Growth Potential: Testosterone-induced Muscle Memory and Underlying Mechanisms

Run by University of Copenhagen · NCT06188767 · Data updated 2026-11-12

This study tests how testosterone affects muscle growth and memory in healthy people who are doing resistance training.

Quick facts

Study typeInterventional
Ages18 Years to 40 Years
SexMen only
Enrollment30 (estimated)
SponsorUniversity of Copenhagen
Academic / other
Locations1 site (Copenhagen)
StatusRecruiting
StartedApril 1, 2025
Main results expectedDecember 1, 2027
Study endsDecember 1, 2028
Registry record updatedApril 10, 2025
Trial IDNCT06188767 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are healthy men and women with a BMI under 26 and normal cardiovascular health.

Probably not a fit

Patients with chronic diseases, those who smoke, or individuals with a history of musculoskeletal injuries may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This project aims to explore the mechanisms behind muscle hypertrophy and muscle memory induced by testosterone and resistance training in healthy individuals. Participants will receive testosterone undecanoate while their muscle physiology is monitored. The study will focus on understanding how testosterone influences muscle adaptation and retention of strength over time. By examining these effects, the research seeks to provide insights into optimizing muscle health and performance.

Why it matters

Potential benefit: If successful, this study could lead to improved strategies for enhancing muscle growth and recovery in various populations.

How similar studies have gone: While there have been studies on testosterone and muscle physiology, this specific investigation into muscle memory mechanisms is relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Healthy men and women
* BMI of \<26 and normal ECG and blood pressure

Exclusion Criteria:

* Smoking
* Chronic disease,
* Use of prescription medication
* Pain due to current or previous musculoskeletal injury
* Resistance training more than once per week in the 12 months leading up to the intervention
* Current or previous use of prohibited anabolic substances

Where it's running

  • The August Krogh Section for Human and Molecular Physiology, Department of Nutrition, Exercise and Sports, University of Copenhagen
    Copenhagen, Denmark
    Recruiting

Study contacts

Similar studies

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.