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AIAI for healthStory 06

Two million hours of sleep train one model

What changedResearchers trained SleepFM-2 on more than two million hours from 235,865 overnight recordings, then tested transfer across diseases, expert-scored sleep events, wearables, and subjective reports. The scale is unusual and the held-out tests are broad. It remains a preprint and does not establish clinical benefit or diagnostic approval.

SleepFM-2 architecture linking overnight body signals to many sleep and health tasks

The useful part

Why it matters

One learned view of overnight brain, heart, muscle and breathing signals may support many downstream health studies instead of a separate model for each sensor and task.

Keep in mind

Good to know

The paper is a preprint and does not establish clinical benefit or diagnostic approval.

Evidence

Primary source

SleepFM-2 authors

Read the complete 9 September 2026 edition