TL;DR
Turn quiet afternoons into listening time
- Thousands of audiobooks, podcasts and originals
- Listen on your phone, tablet or Echo — also offline
- Cancel anytime
A Viewpoint published in Brain Health reviews evidence that physical activity may improve depressive and anxiety symptoms and support some aspects of cognition. Its authors argue that clinicians should prescribe exercise with specific, individualized plans, while noting that evidence for preventing dementia and other long-term outcomes remains limited or observational.
Researchers writing in the journal Brain Health say clinicians should prescribe exercise as part of care for brain health, citing evidence that physical activity may improve depressive and anxiety symptoms and support aspects of cognition. Their Viewpoint also stresses that exercise plans should be individualized and that evidence for preventing dementia or other long-term cognitive conditions is not conclusive.
The authors review findings from randomized controlled trials and meta-analyses suggesting that physical activity programs can reduce symptoms of depression, anxiety and psychological distress. A 2024 network meta-analysis of trials reported reductions in depressive symptoms associated with walking, jogging, yoga and strength training. The Viewpoint says effects were generally greater with higher exercise intensity, though the findings do not mean every activity or schedule will have the same effect for every patient.
The review also describes research linking exercise with memory and executive function. In one randomized trial involving older adults, aerobic exercise increased the volume of the anterior hippocampus and improved memory. The authors say broader research also connects physical activity with cognitive performance, but some of that evidence comes from observational studies, which cannot show that exercise caused the outcomes.
For clinical use, the authors recommend that an exercise prescription set out the activity type, frequency, intensity and duration, as well as safety considerations, barriers and follow-up. They cite World Health Organization recommendations of 150 to 300 minutes of moderate-intensity aerobic activity per week, or 75 to 150 minutes of vigorous activity, plus muscle-strengthening activity on at least two days per week. They say clinicians should adapt those targets to a person’s fitness, symptoms, medical conditions, preferences and access to suitable activities.
Making Exercise Part of Brain Care
The proposal would shift exercise from broad lifestyle advice toward a more specific part of clinical care. A prescription that accounts for a patient’s ability, health and preferences may make it easier to discuss practical barriers and monitor activity alongside other treatment. The authors present exercise as a potential complement to established mental-health interventions, not a replacement for them.
The issue has particular relevance for people who face both psychiatric symptoms and physical-health risks. The Viewpoint notes that people with schizophrenia often experience high levels of sedentary behavior and cardiometabolic disease, and that cognitive difficulties can affect daily functioning. Meta-analytic evidence suggests aerobic exercise may improve global cognition in this population, with possible benefits in working memory, attention and social cognition. The authors caution that the underlying trials are limited in number and size.
Putting exercise into routine care would also require clinicians to address safety and access. A plan must reflect a patient’s medical status and circumstances; a standard target may not be suitable for everyone. The article calls for individualized recommendations rather than a single prescription applied across patients.
Products Worth Considering
Fitbit Versa 2 Health and Fitness Smartwatch with Heart Rate, Alexa, Music, Sleep and Swim Tracking
Fitbit Charge 6 Fitness Tracker – Obsidian/Black
BowFlex Results Series SelectTech Adjustable Dumbbells (Pair)
As an affiliate, we earn on qualifying purchases.
How Exercise May Affect the Brain
The Viewpoint describes brain health as cognitive, emotional, behavioral and social functioning across a person’s life. These functions can be influenced by vascular and metabolic health, inflammation, sleep, physical capacity and social connection. The authors outline several possible ways exercise might affect these systems, while presenting them as proposed pathways rather than a settled explanation.
One proposed mechanism is the muscle–brain axis. Contracting skeletal muscle releases signaling molecules called myokines, which may interact with metabolic, inflammatory, neuroendocrine and neurotrophic pathways linked to mood and cognition. Exercise may also affect brain function through cardiorespiratory and cerebrovascular changes, sleep, reduced vascular and metabolic risks, and psychological effects such as self-efficacy and social connection.
The review also distinguishes evidence about current exercise programs from research into exercise mimetics—experimental drugs or biological agents intended to reproduce selected molecular effects of physical activity. The authors describe these as investigational, potentially relevant in the future for people unable to exercise sufficiently, and not a substitute for safe, accessible physical activity.
“150 to 300 minutes of weekly moderate-intensity aerobic activity or 75 to 150 minutes of weekly vigorous-intensity activity”
— The World Health Organization, as cited in the Viewpoint
Limits of the Current Evidence
The Viewpoint summarizes evidence of varying strength. Trials and meta-analyses support potential benefits for some mental-health symptoms, but observational associations between activity and lower depression or dementia risk cannot prove that exercise caused the difference. The authors also note that research on cognition in people with schizophrenia relies on a limited number of trials with modest sample sizes.
It remains unclear which exercise programs work best for particular patients, what amount is appropriate for different conditions, and how durable benefits may be. The source does not provide a new clinical trial or a single treatment protocol. It also does not establish that exercise alone prevents depression, cognitive impairment, dementia or Alzheimer’s disease. Exercise mimetics remain experimental, and their safety and effectiveness as clinical treatments are not established in the material reviewed.
Individual Plans and Further Trials
The authors’ immediate proposal is for clinicians to make exercise recommendations more specific, individualized and subject to follow-up, taking account of a patient’s health and circumstances. The Viewpoint does not announce a new guideline or a timetable for changes to clinical practice.
For the evidence to become more precise, larger studies are needed, particularly on cognitive outcomes and on how different exercise plans work for distinct patient groups. Until then, the article supports discussing physical activity as a possible component of care while keeping its benefits and limits clear and tailoring activity to individual safety needs.
Key Questions
What are the researchers asking doctors to do?
The authors recommend that clinicians prescribe exercise with a defined activity, schedule, intensity, duration, safety assessment and follow-up, tailored to each patient.
Does the review show that exercise prevents dementia?
No. The Viewpoint reports associations between physical activity and lower risk of cognitive impairment and dementia, but says much of that evidence is observational and cannot establish causation.
What exercise amounts does the article cite?
It cites WHO recommendations of 150 to 300 minutes of moderate-intensity aerobic activity weekly, or 75 to 150 minutes of vigorous activity, plus muscle-strengthening activity on at least two days a week. The authors say plans should be individualized.
Can exercise replace mental-health treatment?
The authors describe exercise as something that may complement established mental-health interventions. The Viewpoint does not recommend replacing other care with exercise.
Are exercise-mimicking drugs available as established treatment?
No established treatment is identified in the source. Exercise mimetics are described as experimental agents that may reproduce selected molecular effects of exercise and remain investigational.
Source: news-medical.net
