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Too Much Sleep Just as Bad as Too Little

Between seven and eight hours of sleep is the ideal duration for optimal cognitive performance according...
Between seven and eight hours of sleep is the ideal duration for optimal cognitive performance according to a new study(Credit: belchonock/Depositphotos)

The first results from the world’s largest sleep study have been published, concluding that between seven and eight hours of sleep is the ideal range for optimal cognitive performance. The study convincingly revealed that too much sleep interestingly correlated with similar cognitive deficits associated with too little sleep. read more