WEBVTT

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At 5, a night shift ends. For the body, the night is not over.

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Night workers sleep by day. And daytime sleep is shorter: 2 to 4 hours less.

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Behind the wheel, two things add up: the body's lowest hour and the sleep that is missing.

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After the last night shift it takes two nights of sleep to get back to normal.

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Night workers are not less attentive. Their body clock follows no roster.

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After a night at work, sleep is not a reward. It comes first.