A Coached Lifestyle Program Boosted Cognition 55% More Than Health Advice Alone

A two-year randomised trial across 11 Latin American countries found that older adults at risk of dementia who received an intensive, coached lifestyle programme improved 55% more on global cognition than those given periodic health education alone.

LatAm-FINGERS enrolled 1,065 participants across 12 sites in Argentina, Bolivia, Brazil, Chile, Colombia, Costa Rica, the Dominican Republic, Ecuador, Mexico, Peru and Uruguay. Results were presented at the Alzheimer’s Association International Conference and published in The Lancet.

What each group actually received

The design matters more than the headline, because both arms were given a lifestyle intervention. This was not a comparison against doing nothing.

The Systematic Lifestyle Intervention (SLI) arm (n=539) received continuous coaching and support: supervised exercise, nutrition counselling based on a modified MIND diet, computerised cognitive training, cardiovascular risk monitoring, and 38 group meetings providing social connection and accountability.

The Flexible Lifestyle Intervention (FLI) arm (n=526) received periodic health education with broad lifestyle recommendations, delivered across four group meetings covering diet, physical activity, cognitive and social engagement, and vascular risk. No continuing coaching, no supervision.

Same broad advice. Radically different intensity of delivery.

The result

The SLI group showed a 55% greater improvement on a composite measure of global cognition than the FLI group, with significantly larger gains in memory, executive function and processing speed.

Because the comparator was itself an active intervention, that 55% is a measure of what structure and support add on top of information — arguably a more useful number for anyone designing a real programme than a comparison against an untreated control would have been.

Where this sits in the evidence

LatAm-FINGERS belongs to the World-Wide FINGERS network, which grew out of the original Finnish FINGER trial — the first large randomised study to show that a multidomain lifestyle intervention could benefit cognition in at-risk older adults. The network exists to test whether that result holds in different countries, health systems and cultures, and the US POINTER study is its American counterpart.

That replication agenda is the point. A finding generated in Finland, in a wealthy country with a well-resourced health system and a relatively homogeneous population, cannot be assumed to transfer.

Adaptation, not translation

The investigators are emphatic that they did not simply port an existing protocol. “We did not simply translate the U.S. POINTER model into Spanish and Portuguese. We adapted it to local cultures,” said lead author Dr Lucia Crivelli.

The distinction is practical. Dietary advice built around Nordic or North American food availability does not survive contact with the varied cuisines and food economies of eleven countries. Exercise programmes assume particular facilities. Group meetings depend on how communities actually gather. Running one protocol across 12 sites on that scale is itself a meaningful demonstration that these programmes can be delivered outside high-income settings.

Why Latin America is the right place to ask

Running this trial across eleven countries was not simply a matter of extending geographic reach. The dementia burden is shifting.

Populations across Latin America are ageing rapidly, and the fastest growth in dementia cases over the coming decades is projected in low- and middle-income countries rather than in the wealthy nations where most dementia research has been conducted. Those same populations often carry a heavier burden of the vascular risk factors — hypertension, diabetes, obesity — that multidomain interventions are specifically designed to address, which in principle leaves more room for benefit.

They have also been badly underrepresented in trials. Evidence generated almost entirely in North America and northern Europe has been applied by default to populations with different diets, different health systems, different levels of educational attainment and different genetic backgrounds. Demonstrating that a structured programme can be delivered at scale across twelve sites in eleven countries is a result in its own right, independent of the cognitive scores.

What it does not establish

Several caveats deserve stating plainly, and they are the same ones that apply across this field.

The outcome was cognitive test performance, not dementia. Two years is far too short to measure whether anyone avoided a diagnosis, and improvement on a composite score does not automatically translate into a lower long-term dementia risk. Cognitive test scores also tend to rise with repeated administration through practice effects, though randomisation should affect both arms similarly.

Lifestyle trials cannot be blinded — participants know which arm they are in, which can influence effort and reporting on some measures. And because the intervention bundled exercise, diet, cognitive training and vascular risk management together, the trial cannot say which component did the work, or whether the benefit came from the coaching and social contact rather than any specific activity.

The honest reading is that sustained, structured support produced measurably better cognitive outcomes than advice alone in a large, diverse population. That is a finding about how to deliver prevention, not a prescription for a single habit. This summarises trial results and is not medical advice.