Cited by 782Hormonal and reproductive studiesAdrenal Hormones and DisordersSperm and Testicular Function

Gonadal Steroids and Body Composition, Strength, and Sexual Function in Men

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Finkelstein, Joel S., Lee, Hang, Burnett-Bowie, Sherri-Ann M., Pallais, J. Carl, Yu, Elaine W., Borges, Lawrence F., Jones, Brent F., Barry, Christopher V. +3 more·2013·New England Journal of Medicine

Abstract

BACKGROUND: Current approaches to diagnosing testosterone deficiency do not consider the physiological consequences of various testosterone levels or whether deficiencies of testosterone, estradiol, or both account for clinical manifestations. METHODS: We provided 198 healthy men 20 to 50 years of age with goserelin acetate (to suppress endogenous testosterone and estradiol) and randomly assigned them to receive a placebo gel or 1.25 g, 2.5 g, 5 g, or 10 g of testosterone gel daily for 16 weeks. Another 202 healthy men received goserelin acetate, placebo gel or testosterone gel, and anastrozole (to suppress the conversion of testosterone to estradiol). Changes in the percentage of body fat and in lean mass were the primary outcomes. Subcutaneous- and intraabdominal-fat areas, thigh-muscle area and strength, and sexual function were also assessed. RESULTS: The percentage of body fat increased in groups receiving placebo or 1.25 g or 2.5 g of testosterone daily without anastrozole (mean testosterone level, 44±13 ng per deciliter, 191±78 ng per deciliter, and 337±173 ng per deciliter, respectively). Lean mass and thigh-muscle area decreased in men receiving placebo and in those receiving 1.25 g of testosterone daily without anastrozole. Leg-press strength fell only with placebo administration. In general, sexual desire declined as the testosterone dose was reduced. CONCLUSIONS: The amount of testosterone required to maintain lean mass, fat mass, strength, and sexual function varied widely in men. Androgen deficiency accounted for decreases in lean mass, muscle size, and strength; estrogen deficiency primarily accounted for increases in body fat; and both contributed to the decline in sexual function. Our findings support changes in the approach to evaluation and management of hypogonadism in men. (Funded by the National Institutes of Health and others; ClinicalTrials.gov number, NCT00114114.).

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  • Different testosterone thresholds may exist for different symptoms including libido, erectile function, muscle anabolism, bone turnover, and adipogenesis, and supplementation beyond a set threshold likely has declining efficacy for that variable.

    “As different T thresholds may exist for different symptoms including libido, erectile function, muscle anabolism, bone turnover, and adipogenesis, supplementation beyond a set threshold likely has declining efficacy for that variable.130, 131”
  • Dose-response studies show that in men whose endogenous testosterone is fully suppressed, add-back administration of increasing doses of testosterone that produce graded increases in circulating testosterone causes a dose-dependent increase in muscle mass and strength.

    “Dose-response studies show that in men whose endogenous testosterone is fully suppressed, add-back administration of increasing doses of testosterone that produce graded increases in circulating testosterone causes a dose-dependent (whether expressed according to testosterone dose or circulating levels) increase in muscle mass (measured as lean body mass) and strength (65, 111).”
  • Androgen sensitivity of responsive tissues differs and may be optimal at different circulating testosterone concentrations.

    “Furthermore, there is evidence that the androgen sensitivity of responsive tissues differs and may be optimal at different circulating testosterone concentrations (65).”
  • Testosterone has a disproportionately greater effect on muscle strength than on muscle mass.

    “These studies did not report muscle strength, but other studies of testosterone dose-response relationships for muscle mass and strength show consistently positively correlation (65, 93, 117, 119), although with disproportionately greater effect on muscle strength than on muscle mass.”
  • Testosterone dose-response relationships for muscle mass and strength show a consistent positive correlation.

    “These studies did not report muscle strength, but other studies of testosterone dose-response relationships for muscle mass and strength show consistently positively correlation (65, 93, 117, 119), although with disproportionately greater effect on muscle strength than on muscle mass.”

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Research works printed but not linked: 1

  1. [1]Liverman CT Blazer DG Testosterone and aging: clinical research directions Washington, DC National Academy of Sciences 2004 25009850

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Authors
Finkelstein, J. S., Lee, H., Burnett-Bowie, S.-A. M., Pallais, J. C., Yu, E. W., Borges, L. F., Jones, B. F., Barry, C. V., Wulczyn, K. E., Thomas, B. J., & Leder, B. Z.
Affiliations
Massachusetts General Hospital (US)
Venue
New England Journal of Medicine
Published
2013-09-12
Volume
369
Issue
11
Pages
1011-1022
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
OpenAlex
W2118553855
Cited by
782
References
40
Citations by year
2026: 36 · 2025: 38 · 2024: 44 · 2023: 44 · 2022: 62 · 2021: 58 · 2020: 64 · 2019: 40 · 2018: 67 · 2017: 83 · 2016: 79 · 2015: 66 · 2014: 89 · 2013: 9 · 2012: 1
FWCI
63.84
Type
journal article
Language
en
Open access
Locations
  • New England Journal of Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Massachusetts General Hospital
  • National Institute on Aging (R01AG030545)
  • National Institute of Diabetes and Digestive and Kidney Diseases (K24DK02759, K24DK002759)
  • National Center for Research Resources (M01RR001066, RR-1066)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Hormonal and reproductive studies
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
  • Health Sciences › Medicine › Reproductive Medicine › Sperm and Testicular Function
Keywords
testosterone replacement therapy, androgen deficiency, hypogonadism, estradiol deficiency, goserelin acetate, anastrozole, testosterone gel, body composition, lean body mass, fat mass, muscle strength, sexual function, healthy men, dose-response relationship
MeSH terms
Adipose Tissue, Adult, Body Composition, Estradiol, Humans, Libido, Male, Middle Aged, Testosterone, Goserelin, Aromatase Inhibitors, Muscle Strength, Young Adult

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