Resistance training may help the ageing mind, modestly

Design

Systematic review and meta-analysis (17 trials), GRADE-assessed

Population

Community-dwelling adults aged 60 and older without cognitive impairment

Primary outcome

Executive function (working memory, cognitive flexibility, inhibitory control)

Effect

Working memory standardised mean difference 0.30 (0.02-0.59); cognitive flexibility 0.50 (0.12-0.88); no gain over other exercise

Exercise is recommended for healthy ageing, and this meta-analysis asked specifically whether resistance (strength) training improves executive function in community-dwelling older adults who are cognitively intact.

Across 17 trials, resistance training improved working memory (standardised mean difference 0.30, 95% CI 0.02 to 0.59) and cognitive flexibility (standardised mean difference 0.50, 95% CI 0.12 to 0.88) compared with inactive controls, but not inhibitory control. When compared with other exercise types rather than no exercise, no domain showed an advantage. The evidence was low certainty, with high risk of bias and varied training protocols.

The practical message is encouraging but measured: resistance training is worth recommending for its established benefits on strength, falls and metabolic health, and it may offer modest cognitive gains too, but it should not be sold as superior to other exercise for the brain. The core advice, that older adults do regular resistance work, stands on firmer ground than the cognitive claim.

• Meta-analysis of 17 resistance-training trials in cognitively intact older adults.
• Working memory improved (standardised mean difference 0.30) and cognitive flexibility (0.50) versus inactive controls.
• No benefit on inhibitory control, and no advantage over other exercise types.
• Evidence was low certainty with high risk of bias.
• Recommend resistance training for strength and falls; treat the cognitive benefit as a modest bonus, not a reason to prefer it over other exercise.

Why it matters

It tempers enthusiasm that strength training uniquely protects cognition, while supporting exercise broadly in older adults.

Don't overread it

The evidence was low-certainty with high risk of bias, and resistance training showed no cognitive advantage over other exercise, so it should not be promoted as a specific brain therapy.

The statistics, in plain English

Standardised mean differences of 0.3 to 0.5 are small-to-moderate effects, but low certainty and high risk of bias mean they could shrink with better trials; the absence of any advantage over other exercise suggests general activity, not strength work specifically, may be what helps.

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