Mind

1. Mindwell supported · human dataAdded 6 August 2026

   Fitter hearts, sharper minds in healthy older adults

   Aerobic exercise programmes that raised older adults' cardiorespiratory fitness by roughly 14% coincided with improvements in cognitive function, with the largest effects on motor function (effect size 1.17) and auditory attention (0.50). Most individual comparisons, however, showed no significant effect, and the review could not confirm the fitness gain itself drives the cognitive benefit.

   ⚠What it shows: Cochrane review of 11 RCTs in adults over 55 without cognitive impairment (search to December 2005); the majority of comparisons were non-significant, and the data are insufficient to show cardiovascular fitness is the mechanism.Meta-analysis · Cochrane Database Syst Rev

   Full breakdown →VO₂max explained →VO2max Calculator →Physical activity and enhanced fitness to improve cognitive function in older people without known cognitive impairment. Cochrane Database Syst Rev 2008
2. Mindpreliminary · human dataAdded 6 August 2026

   Depression tracks with smaller memory-region volume

   Among 2009 cognitively unimpaired older adults aged 50 to 90, those with depression had a smaller CA23DG hippocampal subfield than those without, independent of brain amyloid and tau; within the depressed group, people using antidepressants had smaller CA1 and CA23DG volumes than those who did not.

   ⚠What it shows: Cross-sectional MRI comparison inside one large observational cohort (630 with depression, 1379 without), so it cannot show that depression causes tissue loss; the antidepressant difference is unrandomised and may reflect more severe or longer-standing depression rather than any effect of the drugs.Study · Transl Psychiatry

   Full breakdown →Depression and hippocampal subfield volume in older adults. Transl Psychiatry 2026
3. Mindpreliminary · human dataAdded 6 August 2026

   Your chair may be nudging how much risk you take

   An environment quietly engineered to push people into an expansive rather than contractive posture reliably increased risk-taking on the balloon analogue risk task, an effect that held after accounting for discomfort with the posture and awareness of the manipulation. Effects on self-reported pride were partially mediated by participants' measured neck angle.

   ⚠What it shows: A single laboratory experiment using an incidental posture manipulation; the abstract reports no sample size or participant details, outcomes were self-report plus one computerised risk task, and the suggestion that standing desks or ergonomic setups matter in daily life is the authors' extrapolation rather than something they tested.Study · Br J Psychol

   Full breakdown →Manipulating posture implicitly through environmental constraints influences mood and risk-taking behaviour. Br J Psychol 2026
4. Mindpreliminary · human dataAdded 6 August 2026

   Probiotics fell short on older adults' cognition

   Across 20 randomised trials in older adults, probiotic supplementation showed a small positive trend on cognitive test scores and a reduction in inflammatory markers, but neither reached statistical significance. Heterogeneity between trials was high enough that no true overall effect size could be determined.

   ⚠What it shows: Meta-analysis of 20 randomised controlled trials in older adults; both pooled effects had confidence intervals crossing zero, and the authors state that high heterogeneity prevents determining a true overall effect size.Meta-analysis · Benef Microbes

   Full breakdown →Executive function explained →The role of probiotics in the improvement of cognitive performance of older adults: a meta-analysis. Benef Microbes 2025
5. Mindwell supported · human dataAdded 6 August 2026

   Any exercise, not the combo, may boost older brains

   Combined aerobic and resistance training improved global cognition in healthy adults aged 65 and over compared with doing nothing, but a meta-analysis of 12 randomised trials found it was no better than active comparison conditions.

   ⚠What it shows: Meta-analysis of 12 RCTs (2557 healthy adults aged 65+); the overall pooled effect was non-significant, benefit appeared only against passive controls, and heterogeneity was moderate.Meta-analysis · Exp Gerontol

   Full breakdown →Meta-analysis explained →The regular effects of concurrent aerobic and resistance exercise on global cognition in healthy elderly populations: A systematic review with meta-analysis of randomized trials. Exp Gerontol 2025
6. Mindpreliminary · human dataAdded 6 August 2026

   Exercise may quiet rumination in depression

   In adults with depression, regular exercise reduced rumination and improved cognitive shifting in a meta-analysis of randomised trials, with benefits tied to specific doses: moderate-intensity aerobic sessions for rumination and high-intensity aerobic training for shifting. Inhibition and updating did not improve significantly.

   ⚠What it shows: Meta-analysis pooling few RCTs per outcome (5-9 studies, 260-832 participants); dose effects come from subgroup analyses, and the authors themselves call the findings preliminary and tentative.Meta-analysis · Psychol Sport Exerc

   Full breakdown →Executive function explained →Heart Rate Zone Calculator →Effects of chronic exercise on different central features of depression in adults with depression: A systematic review and meta-analysis of random controlled trials. Psychol Sport Exerc 2025
7. Mindpreliminary · human dataAdded 6 August 2026

   Fitness rose, endocannabinoids didn't budge

   A 12-week programme combining physical exercise with internet-delivered CBT improved six-minute walk distance by 81.6 m more than control in 80 adults with mild-to-moderate depression, exceeding the accepted threshold for a clinically meaningful change. None of nine endocannabinoid biomarkers, including anandamide and 2-AG, shifted more in the intervention group than in controls.

   ⚠What it shows: Single randomised trial, 80 adults with mild-to-moderate depression, 12 weeks plus an 8-week follow-up; the primary analysis was on completers, muscular fitness outcomes were exploratory and non-significant, and depression symptom change is not reported in this abstract.Study · Eur Arch Psychiatry Clin Neurosci

   Full breakdown →VO₂max explained →VO2max Calculator →Effects of an internet-based combined exercise and cognitive-behavioral therapy intervention on endocannabinoid system biomarkers and physical fitness in adults with mild-to-moderate depression: a SONRIE randomized controlled trial. Eur Arch Psychiatry Clin Neurosci 2026
8. Mindpreliminary · human dataAdded 6 August 2026

   Five days of digital practice eased insomnia

   In a three-arm randomised trial of 122 UK undergraduates, five consecutive days of digital attachment security priming or mindfulness practice both produced significant longer-term improvements in stress, insomnia, emotion regulation and academic dropout intention compared with a waitlist control. Attachment priming produced the most consistent and substantial benefits across the follow-up points.

   ⚠What it shows: One randomised trial in 122 UK undergraduate students, compared against a waitlist rather than an active placebo, all outcomes self-reported and follow-up ending at four weeks; effect sizes were not given in the abstract.RCT · Appl Psychol Health Well Being

   Full breakdown →Efficacy of an online attachment priming and mindfulness practice intervention for insomnia, stress, and emotion regulation in university students: A randomized controlled trial. Appl Psychol Health Well Being 2026
9. Mindwell supported · human dataAdded 1 August 2026

   Best exercise for the ageing brain depends on the goal

   A network meta-analysis of 55 randomised trials in 4,603 people with mild cognitive impairment found every exercise modality improved global cognition versus no exercise: multicomponent programmes ranked best overall, mind-body exercise ranked best for memory, and resistance training ranked best for executive function.

   ⚠What it shows: Network meta-analysis rankings (SUCRA) are indirect comparisons and hypothesis-generating; trials varied widely, and head-to-head studies are needed to confirm which modality is truly best for each cognitive domain.Systematic review · Front Aging Neurosci

   Full breakdown →Executive function explained →Exercise modalities in mild cognitive impairment: a systematic review and network meta-analysis of comparative effectiveness. Front Aging Neurosci 2026
10. Mindpreliminary · human dataAdded 1 August 2026

    Encouragement made HIIT feel easier, not lighter

    When coaches delivered motivational cues during high-intensity intervals, elite footballers rated the same workload as less hard and reported better mood and engagement, while heart rate and lactate were unchanged. Prefrontal oxygenation in the orbitofrontal and frontopolar regions was also lower during the final three bouts.

    ⚠What it shows: One randomised crossover trial in 22 male elite footballers doing a single 12-bout cycle-ergometer HIIT session; perceptual and brain-imaging outcomes only, no performance outcome, and findings may not transfer to recreational trainees or to women.RCT · Eur J Sport Sci

    Full breakdown →HIIT explained →Motivational Coaching Cues Can Modulate Prefrontal Cortex Activity and Perceptual Responses of Elite Football Players During High-Intensity Interval Training: A Randomised Crossover fNIRS Study. Eur J Sport Sci 2026
11. Mindpreliminary · human dataAdded 1 August 2026

    Online laughter yoga beat in-person for nurses' sleep

    In a pilot trial with 47 nurses, four laughter yoga sessions delivered online over two weeks significantly improved sleep quality, emotional exhaustion and personal accomplishment, while the same programme delivered face-to-face produced no significant change. Perceived stress did not shift in any group.

    ⚠What it shows: One small pilot RCT: 47 nurses at a single Turkish public hospital, three groups, only four sessions over two weeks, with outcomes measured immediately afterwards by self-report questionnaires. Perceived stress did not change at all, and why the online format outperformed the in-person one is unexplained, with groups this small the split could be chance.Study · Work

    Full breakdown →Pittsburgh Sleep Quality Index (PSQI) explained →Online vs. face-to-face laughter yoga to support nurses' well-being: A pilot randomized trial. Work 2026
12. Mindpreliminary · human dataAdded 1 August 2026

    Umbrella review finds no serotonin link to depression

    An umbrella review of 17 studies across all the main strands of serotonin research found no consistent evidence that depression is associated with lowered serotonin concentration or activity, including in genetic analyses of 115,257 and 43,165 people. Some evidence was consistent with long-term antidepressant use reducing serotonin concentrations.

    ⚠What it shows: A systematic umbrella review of existing reviews and meta-analyses searched to December 2020, so it inherits their limitations: quality was variable, many meta-analyses overlapped, prior antidepressant use was not reliably excluded, and no systematic review of tryptophan depletion studies has been done since 2007. It evaluates the low-serotonin hypothesis, not whether antidepressants relieve symptoms.Study · Focus (Am Psychiatr Publ)

    Full breakdown →The Serotonin Theory of Depression: A Systematic Umbrella Review of the Evidence. Focus (Am Psychiatr Publ) 2026
13. Mindwell supported · human dataAdded 30 July 2026

    Brain training sped up walking, but only when multitasking

    A meta-analysis of 14 randomised trials found that purely mental training, no physical component at all, improved older adults' walking speed while they simultaneously performed a cognitive task, but did nothing measurable for ordinary walking speed, functional mobility or balance.

    ⚠What it shows: Systematic review and meta-analysis of 14 RCTs in older adults; the dual-task gait finding rests on moderate-quality evidence from 376 participants, while the balance estimate was rated very low quality with only 139 participants, and no trial measured falls.Meta-analysis · JMIR Aging

    Full breakdown →Executive function explained →Effects of Pure Cognitive Training on Gait and Balance in Older Adults: Systematic Review and Meta-Analysis. JMIR Aging 2026
14. Mindpreliminary · human dataAdded 29 July 2026

    Lifting weights sharpens some thinking, not all of it

    A systematic review and meta-analysis in healthy adults links multi-session resistance exercise to improvements in global cognition, executive function, working memory and processing speed. Episodic memory showed no consistent benefit.

    ⚠What it shows: Meta-analysis with substantial between-study heterogeneity; interventions varied in duration, intensity and cognitive measures, and evidence in some domains was limited.Review · Ageing Res Rev

    Full breakdown →Executive function explained →The effects of multi-session resistance exercise on cognitive function in healthy adults: A systematic research review and meta-analysis. Ageing Res Rev 2026
15. Mindpreliminary · human dataAdded 29 July 2026

    Tai chi sharpened minds and legs in 12 weeks

    Older adults with mild cognitive impairment who practised tai chi and baduanjin three times a week for 12 weeks outscored controls by 2.04 points on the Montreal Cognitive Assessment and improved strength and mobility, though BMI and body fat didn't significantly change.

    ⚠What it shows: Single 12-week RCT in community-dwelling Chinese adults aged 60+; sample size not reported in the abstract and no long-term follow-up.Study · J Aging Phys Act

    Full breakdown →Executive function explained →Multidimensional Effects of Mind-Body Exercise on Cognitive Function, Physical Function, and Body Composition in Older Adults With Mild Cognitive Impairment: A 12-Week Randomized Controlled Trial. J Aging Phys Act 2026
16. Mindwell supported · human dataAdded 29 July 2026

    Acute and long-term exercise train different brain skills

    Across 16 randomised trials in 868 college students, a single bout of exercise improved cognitive flexibility and inhibitory control but not working memory, while longer-term training improved inhibitory control and working memory but not cognitive flexibility.

    ⚠What it shows: Systematic review and meta-analysis of 16 RCTs totalling 868 college students only; effects varied with test paradigm, exercise dose and scoring method, and several confidence intervals sit close to zero.Systematic review · Front Public Health

    Full breakdown →Executive function explained →Effects of exercise intervention on executive function in college students: a systematic review and meta-analysis of randomized controlled trials. Front Public Health 2026
17. Mindpreliminary · human dataAdded 29 July 2026

    Language learning and cardio: different memory wins

    In a randomised trial of 142 healthy older adults, six months of foreign-language learning kept the CA3/dentate gyrus region of the hippocampus stable while the non-language groups lost volume, whereas aerobic exercise, not language, improved memory precision on a mnemonic discrimination task. Combining both was the only way to get both effects, but the combination did not amplify either one.

    ⚠What it shows: One six-month randomised controlled trial in 142 healthy adults aged 63-78 with four groups, so roughly 35 people per arm; brain volume changes were not actually linked to memory changes, and the findings need replication before anyone claims a protocol for protecting the ageing hippocampus.Study · Imaging Neurosci (Camb)

    Full breakdown →Heart Rate Zone Calculator →Beneficial effects of foreign language learning and aerobic exercise on dentate gyrus volume and mnemonic discrimination in healthy older adults: Results from a randomized controlled trial. Imaging Neurosci (Camb) 2026
18. Mindwell supported · human dataAdded 29 July 2026

    Any exercise mode eases depression and anxiety

    In adults diagnosed with depression or anxiety, exercise produced a large improvement in depressive symptoms and a moderate improvement in anxiety symptoms across randomised trials. Aerobic, resistance and mixed programmes were all beneficial.

    ⚠What it shows: Meta-analysis of 26 RCTs (2,681 participants) in adults with diagnosed depression or anxiety; the anxiety analysis rested on only 11 studies, and the review could not crown a single best exercise mode.Meta-analysis · Int J Ment Health Nurs

    Full breakdown →The Effects of Aerobic and Resistance Exercise on Depression and Anxiety: Systematic Review With Meta-Analysis. Int J Ment Health Nurs 2025
19. Mindwell supported · human dataAdded 29 July 2026

    133 reviews agree: exercise sharpens the mind

    An umbrella review pooling 133 systematic reviews and 2,724 randomised trials found exercise improves general cognition, memory and executive function across all populations and ages. Effects were generally larger for low- and moderate-intensity activity.

    ⚠What it shows: Umbrella review of 258,279 participants; effects were modest in size (SMD 0.24-0.42), overlap between the included reviews is inherent to the design, and review quality varied, though results held after excluding low-quality reviews.Meta-analysis · Br J Sports Med

    Full breakdown →Executive function explained →Effectiveness of exercise for improving cognition, memory and executive function: a systematic umbrella review and meta-meta-analysis. Br J Sports Med 2025
20. Mindwell supported · human dataAdded 29 July 2026

    Exercise shows large effects on depressive symptoms

    Across 41 randomised trials in 2,264 adults, exercise produced large reductions in depressive symptoms compared with non-active controls, with a number needed to treat of 2. The effect remained moderate when analysis was restricted to the 12 low risk-of-bias trials.

    ⚠What it shows: Meta-analysis of 41 RCTs (2,264 participants post-intervention); many trials were small with high heterogeneity in methods, and the effect shrank to moderate in the 12 low risk-of-bias studies.Meta-analysis · Br J Sports Med

    Full breakdown →Meta-analysis explained →Heart Rate Zone Calculator →Exercise as medicine for depressive symptoms? A systematic review and meta-analysis with meta-regression. Br J Sports Med 2023
21. Mindpreliminary · human dataAdded 29 July 2026

    Exercise gives working memory a lift in depression

    Exercise programmes produced a small but significant improvement in working memory in adults with mild-to-moderate depression. Effects on inhibition and cognitive flexibility, two other core executive functions, were not significant.

    ⚠What it shows: Meta-analysis of only 7 controlled studies (202 men, 457 women, aged 21-51, mild-to-moderate depression); high heterogeneity across trials; the authors say the shortage of high-quality studies precludes firm conclusions.Meta-analysis · Int J Environ Res Public Health

    Full breakdown →Executive function explained →Effects of Physical Exercise on Executive Function in Adults with Depression: A Systematic Review and Meta-Analysis. Int J Environ Res Public Health 2022
22. Mindwell supported · human dataAdded 29 July 2026

    Different exercise types, different brain gains

    Pooling 54 randomised trials in healthy children, adults and older adults, exercise improved overall cognition and every domain measured, with aerobic work showing the greatest benefit for global cognition, resistance training for executive function and mind-body exercise for memory. Older adults gained the most.

    ⚠What it shows: Systematic review and meta-analysis of 54 RCTs in healthy people; the type-by-domain comparisons come from moderation analyses across studies rather than head-to-head trials, and the authors say evidence on attention and information processing is still too thin to judge.Meta-analysis · Ageing Res Rev

    Full breakdown →Executive function explained →Effects of exercise interventions on cognitive functions in healthy populations: A systematic review and meta-analysis. Ageing Res Rev 2023
23. Mindpreliminary · human dataAdded 27 July 2026

    VR waterscapes beat landscapes in exercise trial

    In a 12-week randomised trial of virtual reality exercise, participants viewing professionally produced 360° waterscapes improved mental quality of life, fat-free mass and BMI, and reported more restorativeness and less VR sickness than those viewing self-recorded landscapes.

    ⚠What it shows: Single RCT with 40 vs 32 participants over 12 weeks; the groups differed in video production quality as well as scenery type, and outcomes relied partly on self-report questionnaires.Study · J Formos Med Assoc

    Full breakdown →Restorative natural experiences in immersive landscapes and waterscapes during virtual reality exercise for mental health promotion. J Formos Med Assoc 2026
24. Mindpreliminary · human dataAdded 27 July 2026

    Alcohol-free activities track with less heavy drinking

    In a secondary analysis of 1,726 adults treated for alcohol use disorder, those engaging in more alcohol-free activities 6 months after treatment drank heavily less often at 12 months, and the link was stronger among people living in more impoverished communities. It is an observational association within a trial, not proof that adding activities causes less drinking.

    ⚠What it shows: Secondary observational analysis of 1,726 participants from a randomised alcohol use disorder trial at 10 US research units; associations come from Bayesian multilevel models over 12 months and cannot establish cause, and the sample is people who completed formal alcohol treatment.RCT · J Exp Anal Behav

    Full breakdown →Engagement in alcohol-free activities, community-level economic disadvantage, and heavy drinking following alcohol treatment. J Exp Anal Behav 2026

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