Research
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There is no minimal threshold for cognitive benefit from exercise; any amount of physical activity is better than none, though clinically meaningful changes require ~724 METs-min/week.
You do not need to exercise for hours to see brain benefits. Even small amounts of activity help. However, to see significant, clinically meaningful improvements, aim for approximately 724 METs-min per week (e.g., 150 minutes of moderate activity).
GoodQualifiesHIGH confidence
We found no minimal threshold for the beneficial effect of exercise on cognition... The estimated minimal exercise dose associated with clinically relevant changes in cognition was 724 METs-min per week
Why this rating
Based on 44 RCTs and Bayesian modeling.
Source
Optimal dose and type of exercise to improve cognitive function in older adults: A systematic review and bayesian model-based network meta-analysis of RCTs
Daniel Gallardo‐Gómez et al. · Ageing Research Reviews · 2022
DOI 10.1016/j.arr.2022.101591
Meta-analysis · 44 studiesCited 243×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Resistance exercise yields clinically meaningful cognitive improvements in older adults at significantly lower doses (78–679 METs-min/week) compared to aerobic or mixed modalities.Good
- Obesity moderates the dose-response relationship for cognitive benefits, with overweight/obese older adults reaching maximal cognitive benefits at lower exercise doses (~600 METs-min/week) than those with healthy BMI.Good
Related findings · Adherence
- Regular physical activity (at least 150 minutes/week of moderate-intensity) reduces all-cause and cardiovascular mortality by 20-30% and lowers the risk of type 2 diabetes by 25-35%.Strong
- Increasing physical activity from a sedentary lifestyle to an active one in middle adulthood significantly reduces the risk of coronary events compared to remaining sedentary.Strong
- Resistance exercise is the only intervention capable of consistently restoring muscle function and strength in sarcopenia, partially overcoming age-related anabolic resistance.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →