A weekend roundup of sleep research sharpens a familiar finding: a stable wake time matters more for next-day focus than squeezing an eighth hour after a late night. Clinicians still endorse seven-plus hours for most adults, but they warn against catch-up weekends that slide Monday mornings by two hours.
For builders and operators who live on irregular deploys, the practical move is a fixed morning anchor and a wind-down ritual that survives travel. Wearables help as mirrors, not coaches. Treat scores as feedback, not grades.