Estrogen did not show a clear added chair-stand benefit alongside resistance exercise
A blinded trial in older women with knee osteoarthritis found no statistically significant overall advantage on its primary physical performance outcome.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
Adding estrogen to resistance exercise did not produce a statistically significant overall improvement in chair-stand performance compared with placebo plus exercise. This does not prove that an added effect is absent. Signals involving early-stage osteoarthritis and mental health were exploratory and cannot establish which women would benefit from adding estrogen.
The subgroup findings were post hoc. The abstract does not provide detailed later follow-up results, and the absence of serious adverse events in this trial cannot establish safety more broadly.
What researchers found
Between-group difference in chair-stand improvement
Regression coefficient for estrogen versus placebo, both with exercise, at 3 months on the 30-second chair stand test.
The main result takes priority
Chair-stand scores improved in both groups, but the primary analysis did not demonstrate an additional estrogen effect. Because both groups exercised, this comparison addresses adding estrogen and does not isolate the effect of exercise itself.
Exploratory signals need confirmation
Additional analyses suggested possible benefits among participants with early-stage knee osteoarthritis, and mental health scores improved in the estrogen group. Those observations raise research questions but do not overturn the uncertain overall result for physical performance.
The original publication
Oestrogen replacement combined with resistance exercise in older women with knee osteoarthritis: a randomised, double-blind, placebo-controlled clinical trial.
Mitoma T, Ooba H, Takahashi K et al.
Age Ageing · 2025
- PubMed ID
- 40794913
- Record checked
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