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The best exercise for brain health is the one you'll do regularly. Aerobic exercise, strength training, tai chi and even light activity all show benefits for thinking and memory in trials. The largest review so far found exercise improved general cognition, memory and executive function, and for adults over 50, sessions of 45 to 60 minutes at moderate intensity show up most often in the research. This guide sets out what the trials found, how much exercise the research points to, and how to combine types for memory and focus. For background on what "focus" and "memory" mean in practice, see what cognitive performance really means for adults.

What does exercise do for your brain?

Some effects start straight away, and others build over months. The US Centers for Disease Control and Prevention says some benefits begin right after a session of moderate-to-vigorous activity, and that regular activity can reduce the risk of cognitive decline and dementia.

The UK view is similar. Alzheimer's Society calls regular physical activity one of the best things you can do to reduce your risk of dementia, saying regular exercisers may be up to 20% less likely to develop it. The NHS adds the honest caveat that there's no certain way to prevent all types of dementia.

Exercise sits alongside other habits. The 2024 Lancet Commission on dementia found 14 modifiable risk factors account for nearly half of dementias, and advised being cognitively, physically and socially active in mid and later life.

NovusDNA is a UK supplement brand making clearly labelled, science-led supplements tested by Campden BRI, a UKAS-accredited UK laboratory. NovusDNA's Mental Performance Stack combines Lion's Mane, Micronised Creatine and Essential+, and it's designed to sit alongside training, not replace it. No supplement replicates what exercise does for the brain.

Which type of exercise is best for the brain?

Most types help, and the differences between them are smaller than headlines suggest.

The biggest picture comes from a 2025 umbrella review of 133 systematic reviews, covering 2,724 trials and 258,279 participants. Exercise significantly improved general cognition, memory and executive function, and the authors found strong evidence that even light-intensity exercise benefits cognition. Most included reviews were rated low quality, so the size of the benefit is less certain than its direction.

Does strength training help memory and focus?

Yes, and it's often overlooked. In a 12-month trial of 155 women aged 65 to 75, performance on an attention and conflict task improved by 12.6% and 10.9% with once- and twice-weekly resistance training, while it slipped slightly in a balance and toning group.

In people with mild cognitive impairment, the SMART trial found six months of resistance training two to three days a week significantly improved global cognition.

One of NovusDNA's founders, who has trained for years, puts it simply: "You have to have muscle training because muscles, organs, they're all linked."

How much exercise do you need for brain benefits?

Meeting the UK guidelines puts you within the range the research supports.

• Session length and intensity: the 2018 review linked benefits to sessions of 45 to 60 minutes at at least moderate intensity.

• Weekly dose: the 2022 review estimated a minimum of about 724 MET-minutes a week for meaningful cognitive changes in adults over 50, with less clear extra benefit beyond about 1,200. As a rough guide, 150 minutes of brisk walking comes to around 600 to 700 MET-minutes.

• UK guidelines: the UK Chief Medical Officers advise at least 150 minutes of moderate or 75 minutes of vigorous activity a week, strength work on at least two days, and breaking up periods of inactivity.

Why sitting less matters too

Breaking up long periods of sitting is part of UK guidance, and there's an early hint it matters for the brain. In a small study of 35 adults aged 45 to 75, more hours of sitting were linked to a thinner brain region involved in memory. The authors stress it can't show cause and effect, so treat it as a nudge to move more, not proof.

How does exercise change the brain?

One well-studied link is brain-derived neurotrophic factor (BDNF), a protein that supports brain cells. A meta-analysis of 29 studies found a single session of exercise moderately raises BDNF, and regular exercise strengthens the effect. In the walking trial above, larger hippocampal volume went with higher BDNF. For more on how the brain adapts, see our guide to neuroplasticity.

A simple weekly plan based on the research

1. Three to five days: brisk walking, cycling or swimming, building to 150 minutes a week.

2. Two days: strength training for the major muscle groups, with weights, bands or body weight.

3. Two days, if you're older: balance work such as tai chi, which the UK guidelines recommend to reduce frailty and falls.

4. Every day: break up long periods of sitting.

Where nutrition fits: creatine is one of the most studied supplements for people who train. Its authorised UK claim is about physical performance in short bursts of high-intensity exercise, from 3 g a day, which is exactly the strength and interval work above. Research on its cognitive effects is promising for memory but mixed elsewhere, as our guide to creatine for cognitive performance explains. The Mental Performance Stack provides 5 g of micronised creatine per serving, caffeine-free, as three separate products so you can add one at a time.

FAQ

Is cardio or weights better for the brain?

Both help, so the best plan includes both. Aerobic walking increased the size of the hippocampus in a year-long trial, while a 2022 review of trials in adults over 50 found resistance exercise had slightly stronger effects than other types. The UK guidelines already recommend both: 150 minutes of moderate activity a week plus strength work on at least two days.

Does one workout improve focus straight away?

It can. The CDC says some brain benefits start right after a session of moderate-to-vigorous activity, and a meta-analysis found a single session raises BDNF, a protein linked to brain health. Longer-term benefits for memory build with regular training over months, so treat the short-term lift as a bonus rather than the main goal.

How long before exercise improves memory?

Most trials run for several months. The walking trial that increased hippocampal size lasted a year, the resistance training trial in older women ran for 12 months, and the SMART trial ran for six months. Build a routine you can keep, rather than expecting changes in a few weeks.

Can exercise prevent dementia?

It can lower the risk, but it can't guarantee prevention. Alzheimer's Society says regular exercisers may be up to 20% less likely to develop dementia, and the 2024 Lancet Commission lists physical inactivity among 14 modifiable risk factors. The NHS notes there's no certain way to prevent all types of dementia. If you're worried about memory changes, speak to your GP.

I'm over 60 and new to exercise. Where should I start?

Start with walking and simple strength exercises such as sit-to-stands or resistance bands, and build up gradually. The 2025 umbrella review found even light-intensity exercise benefits general cognition. If you have a health condition or haven't exercised for a long time, check with your GP first.

There's no single best exercise for brain health. The strongest evidence supports a mix: regular aerobic activity, strength training twice a week and less time sitting. Meeting the UK guidelines puts you in the range the research supports, and the habit matters more than the exact type.

If you're training regularly and want to see whether creatine and the rest of the stack suit you, try the 7-serving Mental Performance Stack before committing to a month.

This article is for general information and isn't medical advice. Food supplements should not replace a varied, balanced diet and healthy lifestyle.