Sleep
Total Sleep Time
Total sleep time (TST) is minutes actually asleep—not time in bed. Wearables estimate TST from movement and heart rate; polysomnography is the lab gold standard.
Total sleep time (TST) is minutes actually asleep—not time in bed. Wearables estimate TST from movement and heart rate; polysomnography is the lab gold standard.
Most adults need roughly seven to nine hours TST; athletes often need the upper band during heavy blocks.
Related terms
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