ReviewEndocrine reviews2018
Circulating Testosterone as the Hormonal Basis of Sex Differences in Athletic Performance.
Review in Endocrine reviews, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 229 papers, 10 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
229 citing papers in PubMed, 10 syntheses or guidelines pooled it, 539 citations in OpenAlex.
- Coronary Artery Disease in Masters Athletes: A Systematic Review.Sports medicine (Auckland, N.Z.) · 2026Pooled it
- The independent effects of isolated high-intensity interval training modalities on body composition and adiposity indices in overweight or obese adults: a systematic review and meta-analysis.Frontiers in physiology · 2026Pooled it
- Sex differences in human skeletal muscle fiber types and the influence of age, physical activity, and muscle group: A systematic review and meta-analysis.Physiological reports · 2025Pooled it
- The Role and Regulation of Intramuscular Sex Hormones in Skeletal Muscle: A Systematic Review.The Journal of clinical endocrinology and metabolism · 2025Pooled it
- Sex Differences in Upper- and Lower-Limb Muscle Strength in Children and Adolescents: A Meta-Analysis.European journal of sport science · 2025Pooled it
- Sex Differences in Grip Strength From Birth to Age 16: A Meta-Analysis.European journal of sport science · 2025Pooled it
- Plasma and salivary measures of testosterone and cortisol levels in basketball players under various games / training conditions, and nutritional strategies: an updated systematic review.Frontiers in physiology · 2025Pooled it
- Health-related physical fitness in women with polycystic ovary syndrome versus controls: a systematic review and meta-analysis.Archives of gynecology and obstetrics · 2024Pooled it
- How is the Topic of Intersex Athletes in Elite Sports Positioned in Academic Literature Between January 2000 and July 2022? A Systematic Review.Sports medicine - open · 2022Pooled it
- Cardiac Structure and Function in Junior Athletes: A Systematic Review of Echocardiographic Studies.Reviews in cardiovascular medicine · 2022Pooled it
- Investigating the effects of single-dose intranasal testosterone on economic preferences in a large randomized trial of men.Proceedings of the National Academy of Sciences of the United States of America · 2025Trial
- Circulatory lipid signature in response to short-term testosterone gel treatment of healthy young females.Scientific reports · 2025Trial
- The relationship between abdominal fat and sleep quality after combined exercise in patients with type 2 diabetes mellitus.Frontiers in endocrinology · 2025Trial
- Physical Activity, Body Composition, and Fitness Variables in Adolescents After Periods of Mandatory, Promoted or Nonmandatory, Nonpromoted Use of Step Tracker Mobile Apps: Randomized Controlled Trial.JMIR mHealth and uHealth · 2024Trial
- Effectiveness of high intensity and sprint interval training on metabolic biomarkers, body composition, and physical fitness in adolescents: randomized controlled trial.Frontiers in public health · 2024Trial
- A mobile app-based intervention improves anthropometry, body composition and fitness, regardless of previous active-inactive status: a randomized controlled trial.Frontiers in public health · 2024Trial
- Seven-month wintertime supplementation of 1200 IU vitamin D has no effect on hand grip strength in young, physically active males: A randomized, controlled study.Journal of the International Society of Sports Nutrition · 2022Trial
- Trial
- Enhancing the Interpretation of Competition Performance and Physical Characteristics in Male Youth Track and Field Athletes.European journal of sport science · 2026Article
- The conducting airways before and after gender-affirming hormone therapy in transgender individuals.Experimental physiology · 2026Article
169 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors at 3 institutions in 4 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Elite athletic competitions have separate male and female events due to men's physical advantages in strength, speed, and endurance so that a protected female category with objective entry criteria is required. Prior to puberty, there is no sex difference in circulating testosterone concentrations or athletic performance, but from puberty onward a clear sex difference in athletic performance emerges as circulating testosterone concentrations rise in men because testes produce 30 times more testosterone than before puberty with circulating testosterone exceeding 15-fold that of women at any age. There is a wide sex difference in circulating testosterone concentrations and a reproducible dose-response relationship between circulating testosterone and muscle mass and strength as well as circulating hemoglobin in both men and women. These dichotomies largely account for the sex differences in muscle mass and strength and circulating hemoglobin levels that result in at least an 8% to 12% ergogenic advantage in men. Suppression of elevated circulating testosterone of hyperandrogenic athletes results in negative effects on performance, which are reversed when suppression ceases. Based on the nonoverlapping, bimodal distribution of circulating testosterone concentration (measured by liquid chromatography-mass spectrometry)-and making an allowance for women with mild hyperandrogenism, notably women with polycystic ovary syndrome (who are overrepresented in elite athletics)-the appropriate eligibility criterion for female athletic events should be a circulating testosterone of <5.0 nmol/L. This would include all women other than those with untreated hyperandrogenic disorders of sexual development and noncompliant male-to-female transgender as well as testosterone-treated female-to-male transgender or androgen dopers.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.