- 1,075studies in the library match, of 29,380
- 415name it in the title
- 1988–2026years published
- 1,047peer-reviewed articles
The query: title or abstract mentions "exercise", "physical activity", "aerobic", "resistance training", "physical fitness/training", "walking", "tai chi" or "sedentary", matched case-insensitively against each record's title and abstract (its summary field) in alzhub's library of 29,380 study records, as of 2026-11-08. Every count on this page comes from that match. The matched list as JSON.
Cohort studies compare dementia rates in more and less active people over years; randomised trials assign people to an exercise programme and measure cognition, brain volume or, less often, dementia itself. Trials in people who already have mild cognitive impairment or dementia ask a different question: whether exercise slows decline or improves daily function.
The two kinds of evidence do not always agree, partly because people who are already becoming unwell exercise less, which can make activity look more protective in cohorts than it is.
This page describes what published research in alzhub's library reports. It is not medical advice and does not apply to any one person: a doctor who knows the person's history is the only one who can say what a result or a treatment means for them.
What the studies report, in their own words
Whole sentences copied from the abstract or key findings of the highest-scoring matched studies, chosen because they mention the subject and give a figure. 8 of the 1,075 matched records are quoted; each links to its study page and from there to the paper.
“Eligible participants (n = 6,104, 64% female) were randomized 1:1 to a personalized schedule of online coaching in two to four modules (targeting physical activity, nutrition, cognitive activity and depression or anxiety) or a control group that received module-eligible information only.”
“Moderate-certainty evidence indicated that physical exercise interventions had modest to no effect on cognitive function (k= 9, SMD: 0.05; 95 % CI: -0.04-0.13; p = 0.25), whereas multidomain interventions were significantly impactful (k=7, SMD: 0.09; 95 % CI: 0.04-0.15; p < 0.01).”
“There was no significant interaction between mindfulness training and exercise (P = .93 for memory and P = .29 for executive function) at 6 months.”
“At 6 months, all active arms (ie, arms 1 through 4) with aerobic-resistance exercise regardless of the addition of cognitive training or vitamin D, improved ADAS-Cog-13 when compared with control (mean difference, -1.79 points; 95% CI, -3.27 to -0.31 points; P = .02; d = 0.64).”
“Objective To determine whether a 24-month physical activity program results in better cognitive function, lower risk of mild cognitive impairment (MCI) or dementia, or both, compared with a health education program.”
“Exercise interventions were performed 3.4 ± 1.4 days per week at moderate intensity (3.7 ± 0.6 metabolic equivalents) for 45.2 ± 17.0 minutes per session for 18.6 ± 10.0 weeks and consisted primarily of aerobic exercise (65%).”
“Approximately 30%-40% of dementia cases have been estimated to be attributed to modifiable risk factors, including hypertension, smoking and sedentary lifestyle.”
“Physical activity was associated with a decreased incidence of cognitive impairment or decline after correction for funnel plot asymmetry (pooled risk ratio, 0.97; 95% CI, 0.97-0.99), but there was no significant association in follow-ups longer than 10 years.”
What kind of evidence it is
By study design
| Design (as recorded) | Studies |
|---|---|
| Systematic review or meta-analysis | 100 |
| Randomised controlled trial | 104 |
| Other clinical trial | 6 |
| Cohort or longitudinal study | 130 |
| Case-control study | 6 |
| Cross-sectional study | 60 |
| Other recorded design | 13 |
| No design recorded | 656 |
The design is the one named in alzhub's record for the study; a record with none is counted as "no design recorded".
By year
| Year | Studies | Share |
|---|---|---|
| 2026 | 55 | |
| 2025 | 174 | |
| 2024 | 55 | |
| 2023 | 62 | |
| 2022 | 45 | |
| 2021 | 72 | |
| 2020 | 77 | |
| 2019 | 60 | |
| 2018 | 57 | |
| 2017 | 54 | |
| 2016 and earlier | 364 |
Other counts within the matched set
| Peer-reviewed articles | 1,047 |
| Marked open access in the record | 423 |
| Rated "high" evidence strength in alzhub's summary | 323 |
| Rated "moderate" evidence strength in alzhub's summary | 177 |
| Rated "low" evidence strength in alzhub's summary | 565 |
| No evidence-strength rating | 10 |
| Records stating a participant count | 416 |
| Median participants (those records) | 298 |
| Largest participant count | 4,227,297 |
Within the 1,075 matched studies
| Studies… | Count | Rule |
|---|---|---|
| …that are randomised trials | 254 | the abstract also contains "randomised" or "randomized" |
| …in people with MCI or dementia | 336 | the abstract also contains "mild cognitive impairment", "MCI", "with dementia" or "with Alzheimer" |
| …that mention hippocampal or brain volume | 101 | the abstract also contains "hippocampal", "brain volume" or "grey/gray matter" |
The 10 highest-scoring matched studies
Title matches first, then by alzhub's usefulness score, which rates a study's design, journal, evidence and recency, not whether its result is good news.
- Effect of long-term physical exercise and multidomain interventions on cognitive function and the risk of mild cognitive impairment and dementia in older adults: A systematic review with meta-analysis
- A 2 year multidomain intervention of diet, exercise, cognitive training, and vascular risk monitoring versus control to prevent cognitive decline in at-risk elderly people (FINGER): a randomised controlled trial
- Effects of Mindfulness Training and Exercise on Cognitive Function in Older Adults: A Randomized Clinical Trial
- Effects of Exercise Alone or Combined With Cognitive Training and Vitamin D Supplementation to Improve Cognition in Adults With Mild Cognitive Impairment: A Randomized Clinical Trial
- Facility-based and home-based multidomain interventions including cognitive training, exercise, diet, vascular risk management, and motivation for older adults: a randomized controlled feasibility trial
- Effect of a 24-Month Physical Activity Intervention vs Health Education on Cognitive Outcomes in Sedentary Older Adults: The LIFE Randomized Trial
- Can Exercise Improve Cognitive Symptoms of Alzheimer's Disease?
- Physical Activity and Cognitive Decline Among Older Adults: A Systematic Review and Meta-Analysis
- Effect of physical activity on cognitive function in older adults at risk for Alzheimer disease: a randomized trial
- Exercise interventions in Alzheimer's disease: A systematic review and meta-analysis of randomized controlled trials
Systematic reviews and meta-analyses in the set
100 of the matched records are recorded as a systematic review, meta-analysis or umbrella review; the highest-scoring not already listed above:
- Comparison of multiple interventions for older adults with Alzheimer disease or mild cognitive impairment: A PRISMA-compliant network meta-analysis
- Physical inactivity, cardiometabolic disease, and risk of dementia: an individual-participant meta-analysis
- Western diet is associated with a smaller hippocampus: a longitudinal investigation
- Genome-wide association study of habitual physical activity in over 377,000 UK Biobank participants identifies multiple variants including CADM2 and APOE
- Physical activity as a protective factor for dementia and Alzheimer's disease: systematic review, meta-analysis and quality assessment of cohort and case-control studies
Newest matched studies
- Interventions for Cognitive Impairment in Type 2 Diabetes Mellitus: An Umbrella Review of Pharmacological and Lifestyle Strategies, Mechanisms, and Clinical Implications
- From Dementia Prevention Literacy to Preventive Agency: A Proposed Theoretical Framework for Translating Knowledge into Action
- Research attitudes mediate the association between educational attainment and willingness to participate in Alzheimer’s disease research beyond Alzheimer’s disease knowledge
- Beyond Usual Pace: Quick Walking Speed and Brain Health Outcomes in the Framingham Heart Study
- Social participation diversity and cognitive trajectories in older adults with hypertension and diabetes: a longitudinal cohort study
Journals with the most matched studies
| Journal | Studies |
|---|---|
| Journal of Alzheimer's disease : JAD | 31 |
| Journal of the American Geriatrics Society | 28 |
| Neurology | 28 |
| Alzheimer's & dementia : the journal of the Alzheimer's Association | 21 |
| Ageing research reviews | 16 |
Questions
- Does exercise prevent dementia?
- Cohort studies consistently find lower dementia rates in more active people; randomised trials, which are the stronger test, have shown effects on cognition and brain measures over months to a few years but few have been long enough to measure dementia itself. The studies below report what each found.
- How many studies on exercise and dementia does alzhub hold?
- 1,075 of the 29,380 study records in alzhub's library match the query "title or abstract mentions "exercise", "physical activity", "aerobic", "resistance training", "physical fitness/training", "walking", "tai chi" or "sedentary""; 415 of them name it in the title. Counted from the records when this page was built.
- What kinds of study are they?
- 100 systematic review or meta-analysis, 104 randomised controlled trials, 6 other clinical trials, 130 cohort or longitudinal studys, 6 case-control studys, 60 cross-sectional studys; 656 record no design.
- What is the most recent study in the set?
- "Interventions for Cognitive Impairment in Type 2 Diabetes Mellitus: An Umbrella Review of Pharmacological and Lifestyle Strategies, Mechanisms, and Clinical Implications" (medRxiv, 2026), the newest by publication date among the matched records.
- Which journals publish most on it?
- Journal of Alzheimer's disease : JAD (31); Journal of the American Geriatrics Society (28); Neurology (28), counted across the matched records.
Read on
- PreventionLifestyle trials that worked, and the ones that did not.
- Risk factors, rankedPhysical inactivity among the modifiable risks.
- Life-course timelineWhen each risk factor acts.