Check your sleep tracker — doing well in a key metric is linked to lower risk of dementia, heart failure and 81 other conditions

Almost every tracker on the market, from rings to watches and even mattress pads, will estimate how much time you're spending in each phase of sleep.

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Sep 25, 2026 - 15:24
Check your sleep tracker — doing well in a key metric is linked to lower risk of dementia, heart failure and 81 other conditions
Almost every tracker on the market, from rings to watches and even mattress pads, will estimate how much time you're spending in each phase of sleep.
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