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“This is a contradictory question to which science doesn’t have a great answer,” Dr. Doghramji says. Some experiments show that older people are not sleepier during the day if they haven’t slept much at night, but others indicate the opposite. They need as much sleep as when they were in their 30s, but the quality had decreased because health problems mess with our ability to sleep. This is where the misconception probably comes from, he adds.