Meta AnalysisHumann = 569 patients2020
Endogenous transient doping: physical exercise acutely increases testosterone levels-results from a meta-analysis.
Plain-language summary
This meta-analysis set out to see whether physical exercise causes a short-term rise in testosterone levels in men. It pooled data from 48 studies that measured total and free testosterone in men right after exercise, comparing different intensities and timing of the measurements. The analysis found that moderate and high-intensity exercise led to a clear but temporary rise in testosterone, especially when measured right after or within 30 minutes of finishing the workout. Mild exercise did not have the same effect, and the rise did not depend on changes in SHBG (sex hormone-binding globulin, a protein that binds testosterone and sets how much is free and usable).
Key findings
- Moderate and high-intensity exercise caused a short-term rise in testosterone.
- The rise was most noticeable when measured right after or within 30 minutes of exercise.
- Mild exercise did not significantly affect testosterone levels.
- The testosterone increase was independent of changes in SHBG.
How to analyze the study yourself
- Study type
- Meta-analyses pool data from multiple studies to identify patterns, but they rely on the quality and consistency of the original studies.
- Population
- Adult men with a mean age of 29.7 years.
- Funding
- Not reported
- Takeaway
- This study found that moderate and hard exercise produces a real rise in testosterone measured right after the session, and that it fades within about half an hour. Mild exercise did not do it. That spike is a short-lived response to the session rather than a change in your underlying level, so train hard for the things training is actually good for, and do not read the post-workout number as your testosterone going up.