Building your best day for healthy brain aging—The neuroprotective effects of optimal time use

•Physical activity, sleep and sedentary behaviour all affect brain health.•These time-use behaviours are seldom assessed within the same study.•Understanding how 24-h time-use impacts brain health is important.•Advances have been made in data collection tools and statistical analysis.•Future brain research should consider adopting a 24-h time-use approach.