Research
Hormonal
Progressive strength training induces significant muscle hypertrophy and strength gains in older women despite low basal testosterone levels, driven by neural adaptations and acute growth hormone responses rather than chronic hormonal elevation.
Older women can achieve substantial strength and muscle gains through twice-weekly progressive resistance training, even with naturally low testosterone. Focus on progressive overload (40-80% 1RM) rather than expecting hormonal spikes to drive growth.
GoodSupportsHIGH confidence
Both neural adaptations and the capacity of skeletal muscle to undergo training-induced hypertrophy even in older women explain the strength gains... The serum concentrations of hormones remained unaltered, but a low level of testosterone may be a limiting factor in training-induced muscle hypertrophy.
Why this rating
Randomized controlled trial with objective measures (MRI, biopsy, dynamometry) in a specific demographic.
Source
Selective muscle hypertrophy, changes in EMG and force, and serum hormones during strength training in older women
Keijo Häkkinen et al. · Journal of Applied Physiology · 2001
DOI 10.1152/jappl.2001.91.2.569
rct · n=10Cited 368×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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- Acute growth hormone (GH) response to resistance exercise increases in older women after 21 weeks of strength training, while basal hormone levels remain unchanged.Good
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