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Moderate, vigorous exercise boosts cognitive abilities for 24 hours

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Moderate, vigorous exercise boosts cognitive abilities for 24 hours
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Brain boost from exercise and deep sleep lasts through the next day, recent research shows. Image credit: BONNINSTUDIO/Stocksy.
  • Regular exercise is good for brain health.
  • Past studies show the ‘boost’ the brain receives from physical activity normally peaks within the first 10 to 20 minutes.
  • Researchers from University College London have now found that the exercise-caused improvement to cognitive performance may actually last for 24 hours.
  • Scientists also linked sitting less and getting 6 or more hours of sleep to better memory test scores the next day.

Previous research shows that the “boost” the brain receives from exercise typically peaks within the first 10 to 20 minutes.

Now, researchers from University College London, in the United Kingdom, have found that the exercise-related improvement to cognitive performance may actually last for 24 hours.

Scientists also linked sitting less and getting 6 or more hours of sleep — especially additional REM sleep and deep sleep — to better memory test scores the next day.

For this study, researchers recruited 76 adults between the ages of 50 and 83 that had no diagnosis of dementia or cognitive impairment.

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Each participant wore a wrist accelerometer for 8 days to track their physical and sedentary behavior, as well as their sleep patterns.

“Because our cognitive function declines as we age, and having good cognitive function is important for quality of life and independence, we want to continue to understand optimal ways to modify our lifestyle to maintain good cognitive function for as long as possible,” Mikaela Bloomberg, PhD, senior research fellow in the Department of Epidemiology and Public Health at University College London, and lead author of this study told Medical News Today.

“We know from laboratory-based studies that we get a cognitive boost in the minutes to hours following a bout of exercise,” Bloomberg continued. “We wanted to see whether this benefit might last longer than a couple hours, particularly in a group of older adults where maintenance of cognitive function is particularly important, and outside a laboratory setting.”

Upon analysis, Bloomberg and her team found that more moderate or vigorous exercise — compared to a person’s average — was correlated to an improved working memory (the ability to retain information while doing something else) and episodic memory (recalling everyday events) the next day.

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Conversely, researchers discovered that being more sedentary led to decreased working memory the next day.

“Exercise stimulates blood flow and neurotransmitters that contribute to cognitive function,” Bloomberg explained. “[These findings mean] that the memory benefits of physical activity might last longer than previously established from laboratory-based studies.”

The researchers also found that study participants receiving 6 or more hours of sleep had better episodic memory and psychomotor speed compared to those who slept less.

They further found that every 30 additional minutes of REM sleep the previous night was associated with an increase in participants’ attention scores.

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Moreover, each 30-minute increase in slow-wave sleep — also called deep sleep — was correlated to improved episodic memory score.

“Sleep and physical activity are intrinsically linked behaviors; we can’t consider physical activity without taking sleep into account which is why we also considered sleep,” Bloomberg said. “This finding reiterates what is already known about sleep and next-day memory function.”

“It will be interesting as a next step to undertake similar research in a group of adults that is less cognitively healthy than the group we studied, to see whether we see different results,” she added.

“Among older adults, maintaining cognitive function is important for good quality of life, well-being, and independence,” Andrew Steptoe, PhD, professor of psychology and epidemiology and head of the Research Department of Behavioral Science and Health at University College London and co-author of this study said in a press release. “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,” Steptoe continued.

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“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,” he cautioned.

MNT also spoke with Ryan Glatt, CPT, NBC-HWC, senior brain health coach and director of the FitBrain Program at Pacific Neuroscience Institute at Providence Saint John’s Health Center in Santa Monica, CA, about this study.

“While intriguing, the study is small and limited in its generalizability,” Glatt, who was not involved in the research, told us. “The connection between physical activity, sleep, and next-day cognitive benefits warrants further exploration with a larger and more diverse sample.”

“Exercise and sleep are both modifiable lifestyle factors, which means their optimization could have significant implications for cognitive aging and public health interventions. However, more robust evidence is needed to establish these effects over longer periods. Future research should include larger sample sizes, diverse populations — including those with cognitive impairments — and longer follow-up periods to determine if short-term cognitive benefits translate into sustained improvements or reduced cognitive decline.”

– Ryan Glatt, CPT, NBC-HWC

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Finally, MNT spoke withVernon Williams, MD, a sports neurologist, and the founding director of the Center for Sports Neurology and Pain Medicine at Cedars-Sinai Kerlan-Jobe Institute in Los Angeles, about this study.

Williams, who was not involved in the research, commented that the findings add to the data that seem to support mounting evidence of the benefits of activity and exercise to the brain.

“The fact that the study suggests longer duration — not just hours, but evidence of improvement into the following day — is […] noteworthy,” he told us.

“It seems very clear that the more we look and the more it’s formally studied, the more we find evidence that optimizing sleep and physical activity /exercise are beneficial — not just for physical health, but for cognitive health and function as well. Anything we can do to improve the brain’s functions — including how we think, act, and behave — key aspects of who we are and how we interact with our loved ones and the world in general — is important.”

– Vernon Williams, MD

Like Glatt, however, Williams also said he would “like to see this kind of study replicated and findings confirmed in larger numbers or participants.”

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He added: “I’d like to see how we can educate and inform the public (and physicians) in ways that change behavior — and result in the benefits suggested by the study. There are a host of questions and opportunities for research that can benefit individuals and society as a whole around the concept of the effects of sleep and exercise on cognition. It’s exciting!”

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Lawlor: It’s a fitness exercise, but there were lots of positives – Fleetwood Town Football Club

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Lawlor: It’s a fitness exercise, but there were lots of positives – Fleetwood Town Football Club


Lawlor: It’s a fitness exercise, but there were lots of positives – Fleetwood Town Football Club



















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The NHS has reignited the hybrid working debate – but WFH isn’t the health risk, this is

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The NHS has reignited the hybrid working debate – but WFH isn’t the health risk, this is

The latest NHS exercise guidance reinforces what we’ve been preaching for years: hitting that 150-minute weekly movement target isn’t necessarily a get-out-of-jail-free card. It states that prolonged sedentary time is independently harmful, even for those of us who diligently carve out time for the gym. Verbatim, it says ‘prolonged sitting is harmful, even in people who achieve the recommended levels of moderate to vigorous physical activity’.

Chief Medical Officer Professor Sir Chris Whitty has been especially vocal about how detrimental it could be, highlighting hybrid working as a potential health hazard. ‘Without wanting to exaggerate, I think it’s important people think through, for example, hybrid working means quite a lot of people could very easily do very little other than leave their homes, where previously people would be routinely going to work, and that often meant at least some physical [activity],’ he said at a briefing.

I understand his logic, but it’s pretty reductive. Working from home isn’t the villain here – working from one chair is.

When we label remote work as “bad for your health”, we risk throwing the baby out with the bath water. In reality, for many – certainly the whole of the Women’s Health office, but also my less-fitness-conscious sister and stepdad, plus my entire friendship group – working from home often means being more active. It means more time to fit in a lunchtime run, to get some steps in before work, or to run some errands on a quick break.

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Whitty suggests commuting increases incidental movement

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On the other hand, plenty of office workers are more sedentary than they are at home. They sit at a desk for nine hours straight before driving home, whether to be seen to work tirelessly in front of their manager, or simply because they’re pulled from pillar to post in an office setting. For those who do have an office commute, eliminating that often stressful period of the day allows for better sleep, and more time for the movement breaks we need to break up the dreaded sedentary time. Not to mention that many commutes are almost entirely sedentary on a train/tube/bus.

The potential problem, the advice suggests, is the lack of incidental movement – the walk to the train, the stroll to a meeting room, or heading out for lunch – that’s naturally baked into your day when you’re in the “official” office. Without a commute or a day in the office, the onus is on you to manufacture movement in.

nhs exercise guidance
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Regular stretching counts as a movement break

Without sounding evangelical, I’ve made this a non-negotiable part of my day. On WFH days, I work out or walk every single morning before I log on, and walk again every evening, even if just a lap around the block. During the day, I have a personal rule: if I’m downstairs, I use the upstairs toilet (and vice versa). Sounds excessive, but it forces me to activate my muscles and add to my step count every few hours.

Beyond that, the options are endless if you’re intentional. Use a standing desk or put your laptop on a kitchen worktop during calls. Take every phone meeting on foot, pacing your hallway if necessary. Set a timer to stand up every 30 mins to stretch, grab a glass of water, or do a quick load of laundry.

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We don’t need to return to the office to be healthy; we need to bring movement back into our homes. The goal: to stop being professional sitters.

Headshot of Bridie Wilkins

As Women’s Health UK’s fitness director and a qualified Pilates and yoga instructor, Bridie Wilkins has been passionately reporting on exercise, health and nutrition since the start of her decade-long career in journalism.

After earning a first-class degree in journalism and NCTJ accreditation, she secured her first role at Look Magazine, where she launched the magazine’s health and fitness column, Look Fit, before going on to become Health and Fitness writer at HELLO!

Since, she has written for Stylist, Glamour, Cosmopolitan, Marie Claire, Elle, The Metro, Runner’s World and Red. Today, she oversees all fitness content across Women’s Health online and in print, spearheading leading cross-platform franchises, such as ‘Fit At Any Age’, which showcases the women proving that age is no barrier to exercise.

She has also represented the brand on BBC Radio London, plus various podcasts and Substacks – all with the aim to encourage more women to exercise and show them how. Outside of work, find her trying the latest Pilates studio, testing her VO2 max for fun (TY, Oura), or posting workouts on Instagram.   

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A Strength Coach Says These Two Exercises Are All You Need to Build Stronger Shoulders

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A Strength Coach Says These Two Exercises Are All You Need to Build Stronger Shoulders

If you ask anyone on the gym floor how to grow a bigger set of shoulders, you’ll probably find that no two answers are the same. In between front raises, upright rows, machine presses and cable raises, shoulder day can quickly become a long list of exercises.

However, fitness creator and coach Eric Evans, also known on social media as Average to Jacked, thinks most lifters are overcomplicating things. He says that if he had to start from scratch after over a decade of training, he’d strip his shoulder workouts back to just two simple moves.

‘If I had to start over today, I’d build my shoulders with just two movements: a lateral raise and also a rear delt fly,’ he explains.

According to Evans, the reason for this isn’t because those exact exercises are magic, but because they work the correct movement pattern for the muscle.

‘Your body doesn’t know the name of the exercise you’re doing,’ he argues. ‘It really only knows the fundamental movement pattern you’re asking it to perform and also the amount of tension you’re placing on the muscle.’

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So, you don’t have to perform cable lateral raises if your gym only has dumbbells, or use a reverse pec deck if you’d rather do bent-over rear delt flyes. As long as you’re training the same movement pattern and progressing the move with intensity or volume, you’ll achieve a similar result.

According to the coach, lateral raises deserve a place in your programme because they primarily target the side delts, helping create broader-looking shoulders and a more pronounced ‘V-taper’. Rear delt flyes train the back of the shoulders to create a rounder, more 3D physique.

‘I’m not including anything for the front delts, and that’s intentional,’ he says. ‘Your front delts are already heavily involved every time you do pressing exercises for your chest.’

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For most lifters already bench pressing, incline pressing or overhead pressing regularly, he argues the side and rear delts are more likely to be the limiting factor.

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‘I don’t think the front delts are what’s holding their shoulders back. I think it’s the side and rear delts,’ he adds.

He recommends focusing on controlling every rep, and avoiding using momentum to swing the weight. He also suggests working in the 8-15 rep range, adding reps until you reach the top of the range before increasing the load and repeating the process – also known as progressive overload.

‘You definitely don’t need to hit your shoulders from 10 different angles,’ he says. ‘You just need to consistently train these two movement patterns, push them hard and then gradually get stronger over time.’

The Bottom Line

Research suggests muscle growth is driven more by sufficient training volume, progressive overload and proximity to failure than by constantly changing exercises and programme hopping. In fact, that could hinder it. So if your shoulder workouts have become jam-packed with unnecessary variations, simplifying your approach may be exactly what helps you make more consistent progress in the long term.


If there’s one thing Kori Sampson knows, it’s how to optimise your body composition for performance. To tap into his knowledge as an elite athlete and coach, we asked him to create a 4-week plan to help you move faster, recover quicker and keep pushing when the fatigue sets in – all while improving your muscle-to-fat ratio.

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Ready to build muscle, burn fat and come out the other side looking, feeling and performing better? Click here to get 14 days of free access to the plan via the Men’s Health app.

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