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Short-term cognitive boost from exercise may last for 24 hours

On average, people aged 50 to 83 who did more moderate to vigorous physical activity than usual on a given day did better in memory tests the day after.

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The short-term boost our brains get after we do exercise persists throughout the following day, suggests a new study led by UCL (University College London) researchers.

Previous research in a laboratory setting has shown that people’s cognitive performance improves in the hours after exercise, but how long this benefit lasts is unknown.

The new study, published in the International Journal of Behavioral Nutrition and Physical Activity, found that, on average, people aged 50 to 83 who did more moderate to vigorous physical activity than usual on a given day did better in memory tests the day after.

Less time spent sitting and six hours or more of sleep were also linked to better scores in memory tests the next day.

More deep (slow-wave*) sleep also contributed to memory function, and the research team found this accounted for a small portion of the link between exercise and better next-day memory.

The research team looked at data from 76 men and women who wore activity trackers for eight days and took cognitive tests each day.

Lead author Dr Mikaela Bloomberg (UCL Institute of Epidemiology & Health Care) said: “Our findings suggest that the short-term memory benefits of physical activity may last longer than previously thought, possibly to the next day instead of just the few hours after exercise. Getting more sleep, particularly deep sleep, seems to add to this memory improvement.

“Moderate or vigorous activity means anything that gets your heart rate up – this could be brisk walking, dancing or walking up a few flights of stairs. It doesn’t have to be structured exercise.

“This was a small study and so it needs to be replicated with a larger sample of participants before we can be certain about the results.”

In the short term, exercise increases blood flow to the brain and stimulates the release of neurotransmitters such as norepinephrine and dopamine which help a range of cognitive functions.

These neurochemical changes are understood to last up to a few hours after exercise. However, the researchers noted that other brain states linked to exercise were more long-lasting. For instance, evidence suggests exercise can enhance mood for up to 24 hours.

A previous study, published by a separate research team in 2016, also found more synchronised activity in the hippocampus (a marker of increased hippocampal function, which facilitates memory function) for 48 hours after high-intensity interval training (HIIT) cycling.  

Co-author Professor Andrew Steptoe (UCL Institute of Epidemiology & Health Care) said: “Among older adults, maintaining cognitive function is important for good quality of life, wellbeing, and independence. It’s therefore helpful to identify factors that can affect cognitive health on a day-to-day basis.

“This study provides evidence that the immediate cognitive benefits of exercise may last longer than we thought. It also suggests good sleep quality separately contributes to cognitive performance.

“However, we can’t establish from this study whether these short-term boosts to cognitive performance contribute to longer term cognitive health and though there is plenty of evidence to suggest physical activity might slow cognitive decline and reduce dementia risk, it’s still a matter of some debate.”

For the new study, the researchers looked at data from wrist-worn activity trackers to determine how much time participants spent being sedentary, doing light physical activity, and doing moderate or vigorous physical activity. They also quantified sleep duration and time spent in lighter (rapid eye movement, or REM) sleep and deeper, slow-wave sleep.

In looking at the links between different types of activity and next-day cognitive performance, the research team adjusted for a wide variety of factors that might have distorted the results, including the amount of moderate or vigorous physical activity that participants did on the day of the tests.

They also accounted for participants’ average levels of activity and sleep quality across the eight days they were tracked, as participants who are habitually more active and typically have higher-quality sleep perform better in cognitive tests.

The team found that more moderate or vigorous physical activity compared to a person’s average was linked to better working memory and episodic memory (memory of events) the next day. More sleep overall was linked to improved episodic and working memory and psychomotor speed (a measure of how quickly a person detects and responds to the environment). More slow-wave sleep was linked to better episodic memory.

Conversely, more time spent being sedentary than usual was linked to worse working memory the next day.

The study is among the first to evaluate next-day cognitive performance using a “micro-longitudinal” study design where participants were tracked going about their normal lives rather than having to stay in a lab.

Among the study limitations, the researchers noted that the participants were a cognitively healthy group, meaning the results might not be true for people who have neurocognitive disorders.

The study involved researchers from the UCL Institute of Epidemiology & Health Care, UCL Division of Surgery & Interventional Science and the University of Oxford, and received funding from the UK’s Economic and Social Research Council (ESRC).

*Slow-wave sleep was given its name based on the characteristic brain waves that can be observed during this stage of sleep. It is deep, restorative sleep, where a person’s heart rate slows and blood pressure decreases.

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Wellness

Exercise to treat depression yields similar results to therapy

Depression is a leading cause of ill health and disability, affecting over 280 million people worldwide. Exercise is low-cost, widely available, and comes with additional health benefits, making it an attractive option for patients and healthcare providers. 

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Exercise may reduce symptoms of depression to a similar extent as psychological therapy, according to an updated Cochrane review. When compared with antidepressant medication, exercise also showed a similar effect, but the evidence was of low certainty.  

Depression is a leading cause of ill health and disability, affecting over 280 million people worldwide. Exercise is low-cost, widely available, and comes with additional health benefits, making it an attractive option for patients and healthcare providers. 

The review, conducted by researchers from the University of Lancashire, examined 73 randomized controlled trials including nearly 5,000 adults with depression. The studies compared exercise with no treatment or control interventions, as well as with psychological therapies and antidepressant medications. 

The results show that exercising can have a moderate benefit on reducing depressive symptoms, compared with no treatment or a control intervention. When compared with psychological therapy, exercise had a similar effect on depressive symptoms, based on moderate-certainty evidence from ten trials. Comparisons with antidepressant medication also suggested a similar effect, but the evidence is limited and of low certainty. Long-term effects are unclear as few studies followed participants after treatment.  

Side effects were rare, including occasional musculoskeletal injuries for those exercising and typical medication-related effects for those taking antidepressants, such as fatigue and gastrointestinal problems.

“Our findings suggest that exercise appears to be a safe and accessible option for helping to manage symptoms of depression,” said Professor Andrew Clegg, lead author of the review. “This suggests that exercise works well for some people, but not for everyone, and finding approaches that individuals are willing and able to maintain is important.” 

The review found that light to moderate intensity exercise may be more beneficial than vigorous exercise, and that completing between 13 and 36 exercise sessions was associated with greater improvements in depressive symptoms.

No single type of exercise was clearly superior, although mixed exercise programmes and resistance training appeared more effective than aerobic exercise alone. Some forms of exercise, such as yoga, qigong and stretching, were not included in the analysis and represent areas for future research. Long-term effects are unclear as few studies followed participants after treatment.

This update adds 35 new trials to previous versions published in 2008 and 2013. Despite the additional evidence, the overall conclusions remain largely unchanged. This is because the majority of trials were small, with fewer than 100 participants, making it difficult to draw firm conclusions.

“Although we’ve added more trials in this update, the findings are similar,” said Professor Clegg. “Exercise can help people with depression, but if we want to find which types work best, for who and whether the benefits last over time, we still need larger, high-quality studies. One large, well-conducted trial is much better than numerous poor quality small trials with limited numbers of participants in each.”

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Wellness

Aerobic exercise may be most effective for relieving depression/anxiety symptoms

While supervised and group exercise may be best for reducing depression, shorter (up to 8 weeks) lower intensity exercise may be best for relieving anxiety.

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Aerobic exercise, such as running, swimming, and dancing, may be most effective for relieving the symptoms of depression and anxiety, finds an overarching (umbrella) review and data synthesis of the available evidence, published in the British Journal of Sports Medicine.

While supervised and group exercise may be best for reducing depression, shorter (up to 8 weeks) lower intensity exercise may be best for relieving anxiety.

But all forms of exercise are as good as, or better than, medication and talking therapies, regardless of age or sex, the findings indicate.

Depression and anxiety affect up to 1 in 4 people worldwide, with the highest prevalence among young people and women, note the researchers. And previously published research suggests that exercise compares favourably with psychotherapy and medication for easing the symptoms, they add.

But it’s not clear how well exercise might work at different ages, frequency, and intensities.And previous overarching syntheses have focused only on adults or included participants with potentially influential factors, such as long term conditions.

The researchers therefore set out to comprehensively estimate the impact of exercise on depression and anxiety symptoms across all age ranges, including in those with and without a clinical diagnosis; and to find out whether the type, length, frequency, intensity, and supervision of exercise, and individual or group participation might influence outcomes.

They scoured research databases for pooled data analyses of randomised controlled trials that compared exercise with either another type of activity, or a placebo, or no active intervention, and published in English up to July 2025.

Eligibility criteria included planned, structured, repetitive and purposeful physical activities to improve physical and mental health; and all forms, intensities, frequencies and settings (individual or group) of exercise.

For depression, 57 pooled data analyses, comprising 800 component studies, involving 57,930 participants aged between 10 and 90, were included in the overarching synthesis.

These participants had been diagnosed with clinical depression or were experiencing depressive symptoms, but had no other co-existing conditions. Exercise interventions were categorised as aerobic (19 pooled data analyses); resistance, such as strength training (8); mind–body, such as yoga, tai-chi, and qigong (16); or a mix (39).

For anxiety, 24 pooled data analyses, comprising 258 component studies, involving 19,368 participants, aged between 18 and 67, were included in the overarching synthesis. Exercise interventions were categorised as aerobic (7); resistance (1); mind–body (9); or mixed (13).

Synthesis of the pooled data analyses showed that exercise had a medium sized effect on depression symptoms and a small to medium sized effect on anxiety symptoms, with the most substantial effects found for young adults (18-30) and women who had recently given birth.

All forms of exercise were associated with positive effects, with aerobic, group based and supervised formats the most effective for relieving depression symptoms. Aerobic, resistance, mind–body and a mix of different exercise formats had a medium sized impact on the relief of anxiety symptoms.

The effects were on a par with, or better than, medication or talking therapies.

The researchers acknowledge some limitations to their findings. These include the variable interpretations of exercise intensity and length among the pooled data analyses, and the relative paucity of pooled data analyses on the impact of exercise across the lifespan.

But they nevertheless conclude: “This meta-meta-analysis provides robust evidence that exercise effectively reduced depression and anxiety symptoms across all age groups, comparable with, or exceeding, traditional pharmacological or psychological interventions.

“Group and supervised formats gave the most substantial benefits, underscoring the importance of social factors in mental health interventions. With evidence that different characteristics of exercise appear to impact depression and anxiety at varying magnitudes, tailored exercise programmes must be prescribed.”

They continue: “Given the cost effectiveness, accessibility, and additional physical health benefits of exercise, these results underscore the potential for exercise as a first line intervention, particularly in settings where traditional mental health treatments may be less accessible or acceptable.”

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Dance effective in fighting against cognitive decline in Parkinson’s

Dance can be beneficial in halting the cognitive decline associated with Parkinson’s disease and, for some participants, they even showed signs of improvement.

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new study led by researchers at York University shows that dance can be beneficial in halting the cognitive decline associated with Parkinson’s disease and, for some participants, they even showed signs of improvement. Faculty of Health Associate Professor Joseph DeSouza, co-author of the study, says since cognition is nearly always expected to decline as the illness progresses and this was a multi-year study, the findings are quite remarkable.

“The classic progression of Parkinson’s disease is that cognition gets bad as well as motor symptoms, and some people already have significantly impaired cognition by the time they get to a diagnosis,” says DeSouza, who worked closely on the study with lead author Simran Rooprai, a second-year interdisciplinary master’s student at York. “So finding that no one in the dance group had further cognitive decline over six years, we think that’s pretty significant.”

The study, published in the Journal of Alzheimer’s Disease, looked at 43 participants from a group with Parkinson’s participating in the Sharing Dance Parkinson’s program at the National Ballet of Canada and the Dance for Parkinson’s Disease program through Trinity St. Paul’s Church, both located in Toronto, and a reference group of 28 people with Parkinson’s who were sedentary and not engaged in any physical activity.

Dance classes would begin with a seated warm-up, followed by “barre” exercises, and sessions ended with floorwork dances. One group was also taught a specific choreography in preparation for an upcoming performance.

The researchers found that the cognitive scores for the dance group had improved compared to the reference group, where they saw no changes, or a slight decline.

Rooprai says the research shows that dance could help with cognitive preservation, or perhaps even improvement in those with Parkinson’s.

“We can’t really fix the brain, but we’re trying to show that with dance, maybe we can delay the onset of further cognitive decline,” says Rooprai.

While Parkinson’ disease is most closely associated with the characteristic tremors of the disease, it is also associated with cognitive decline, with four out of five people with the illness eventually experiencing severe cognition problems as the disease progresses.

Earlier research led by DeSouza at York that he worked on with fellow author and former York PhD student Karolina Bearss, now a professor at Algoma University, has shown the benefits of dance for depression and motor symptoms of the illness, suggesting the benefits of dance are widespread.

“Dance engages many parts of the brain,” says Rooprai. “While dancing, you’re listening to music, learning new steps, remembering the different sequences, and you’re engaging with other dancers so you’re aware of your surroundings. Dance is physical, mental, and social all at once.”

DeSouza and Rooprai are working on a follow-up study in collaboration with the Baycrest Academy for Research and Education, where they will look at how working memory is affected for people with Parkinson’s taking weekly dance classes.

“Given how dance has so many different positive impacts on cognition, we expect to see improvements,” says DeSouza.

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