New study suggests 4.5 to 6.5 hours sleep is optimal to prevent cognitive decline in older folk

New study suggests 4.5 to 6.5 hours sleep is optimal to prevent cognitive decline in older folk. By Greg Elder.

The study showed that sleeping longer than 6.5 hours was associated with cognitive decline over time – this is low when we consider that older adults are recommended to get between seven and eight hours of sleep every night. …

But while the researchers of this study seem to suggest there’s an optimal sleep duration – between 4.5 and 6.5 hours every night – the occasional weekend lie-in is unlikely to do your brain any harm.

Interesting.