Madhura Lotlikar

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Research shows that sleep deprivation impairs communication between brain regions and brain blood flow, damages brain wiring and makes a young brain look like an aged brain. (Shutterstock)

Sleep deprivation benefited our ancestors, yet harms us now — but staying fit may help us cope

Madhura Lotlikar, McGill University

Ancient humans chose to sleep less, which had evolutionary benefits. For modern humans, sleeping less is futile and detrimental, but fitness may be a powerful ally in today’s epidemic of sleep loss.

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