Resistance training → Testosterone
Higher Resistance training moves Testosterone in a non-linear way. Dose or timing can flip the sign.
Ahtiainen 2016: twelve months of resistance training left testosterone production and clearance unchanged in five men near 28 and eight men near 70; a 5×10RM session could raise serum T by slowing clearance.
Observational · Low · N=13
Supported by an experiment or a tightly identified design. Read the caveats.
Mechanism
Ahtiainen, Nyman, Huhtaniemi, and colleagues trained five men aged about 28 and eight men aged about 70 for twelve months. Before and after that year they put each man through a 5×10RM leg-press session and measured testosterone production and metabolic clearance with a stable-isotope dilution method, plus muscle androgen receptors and serum LH. A session could raise serum testosterone. The authors traced that rise to a drop in clearance, not a rise in production. After twelve months, production, clearance, receptors, and LH had not moved. Older men already made less testosterone under gonadotropin stimulation and excreted less androsterone and etiocholanolone in urine. The year of lifting did not close that gap. Testosterone metabolism stayed stable in both age groups. Leproult and Van Cauter restricted sleep for one week in ten young men and cut daytime testosterone by 10 to 15 percent. That paper is not a resistance-training trial. Sleep still sits behind observational plots that treat lifting as a testosterone protocol.
Caveats
Ahtiainen is five younger men and eight older men. Men only. A year of lifting left testosterone production and clearance where they were. A session-day rise from slower clearance is not a higher resting level. Leproult 2011 restricted sleep in ten young men for one week. It is not a resistance-training trial. Sleep, and who can keep a year of training, still sit behind observational plots that treat lifting as a testosterone protocol.
Effect
qualitative. Ahtiainen 2016: a 5×10RM session can raise serum T by lowering clearance; twelve months of training left production and clearance unchanged (5 younger, 8 older men).
Nodes
Named confounders
Cite this page
What Causes What. “Resistance training → Testosterone.” https://whatcauseswhat.org/edges/e-training-testosterone (atlas updated 2026-09-02).
Papers
- Effect of 1 week of sleep restriction on testosterone levels in young healthy men
R. Leproult, E. Van Cauter · 2011 · JAMA
- Effects of resistance training on testosterone metabolism in younger and older men.
JP Ahtiainen, K Nyman, I Huhtaniemi, T Parviainen, M Helste, A Rannikko, WJ Kraemer, K Häkkinen · 2016 · Experimental gerontology