We lost an hour of sleep Sunday morning when we set our clocks ahead to “spring forward.” And while we'll gain an extra hour of daylight in the evenings, we'll lose it in the morning—waking up, and maybe even heading off to work or school, before the sun comes up. An hour may not seem like a lot, but the time shift can have significant effects on the body, says Dr. Sandhya Kumar, assistant professor of neurology and medical director of the Sleep Disorders Center at Wake Forest Baptist Medical Center in North Carolina.
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