Multicomponent training may help preserve memory and executive function in mild cognitive impairment

The review identified 16 systematic reviews published between 2012 and 2025, encompassing 84 unique randomized controlled trials across 5,818 participants after removing duplicates (median age 74.8 years). The most commonly studied interventions combined physical exercise with cognitive training and psychosocial elements, typically delivered in 60-minute sessions, 2–3 times weekly, over 16 weeks. Across these trials, memory improvement was reported in 57.1% of studies, executive function in 54.1%, global cognition in 47.1%, and attention in 42.9%—though these figures reflect the proportion of positive findings rather than pooled effect sizes. The authors cautioned that certainty of evidence was inconsistent across reviews and that methodological heterogeneity limits confident interpretation. Despite this variability, the pattern suggests multicomponent approaches targeting memory and executive function merit attention in MCI prevention.

The umbrella review found that cognitive-physical combined interventions predominated in the literature, which is important because multicomponent approaches appear to engage multiple cognitive systems simultaneously. Subgroup patterns suggest memory and executive function may respond more consistently than other domains (attention showed improvement in only 42.9% of trials), though the review did not formally analyze which component combinations worked best or which subgroups benefited most. The median 16-week program length and 2–3 sessions per week frequency reflect what appears in published research; some trials lasted only 10 weeks while others extended to 24 weeks, suggesting dose-response relationships remain uncertain. A key limitation is that these proportions of positive findings do not represent true effect sizes—a study reporting "improved memory" may have found a small shift or a large one—and the methodological quality of included reviews varied significantly, meaning some conclusions rest on weaker evidence than others. The certainty of evidence for global cognition was particularly mixed, making it harder to know whether broad cognitive benefits occur or whether gains target specific functions.