For the study, the investigators analyzed data on sleep patterns, mental health and well-being from nearly 500,000 British adults, aged 38 to 73, who completed a series of thinking tests. Brain imaging and genetic data were available for nearly 40,000 of the participants.
Seven hours of sleep per night was optimal for cognitive performance and mental health, according to the study published April 28 in the journalParticipants who got too little or too much sleep did worse on tests that measure processing speed, visual attention, memory and problem-solving skills. They were also more likely to have
Source: Healthcare Press (healthcarepress.net)
Ever since Vietnam and without PTSD I get 4 hours of sleep at night. I do take a 45 min catnap during the day. My wife is amazed at the energy levels. Its how you train yourself, plus nutrition. During a battle in Nam I went 5 days with no sleep,eyes turned everything brown.
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