The National Sleep Foundation's 2011 poll found 63 percent of Americans report a sleep problem every night, and that light-emitting laptops and phones are widely used in the hour before bed. Harvard's Charles Czeisler says evening light suppresses melatonin and delays sleep.
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Lifestyle
This Daily Mistake Can Make You Obese and Forgetful
A study links sleeping fewer than five hours a day to more than double the risk of angina, coronary heart disease, heart attack or stroke, while sleeping more than nine hours raised risk by 50 percent. Separate research found catch-up sleep nearly erases the fatigue left by several short nights.
Lifestyle
Secret to a Good Night's Sleep is in the "Waves"
Harvard, Massachusetts General and Brigham and Women's researchers report in Current Biology that how well a sleeper blocks out noise tracks with sleep spindles — bursts of fast brain rhythm rising from the thalamus that punctuate slow-wave sleep.
Lifestyle
Americans Don't Get Enough Sleep
The National Sleep Foundation's annual poll found fewer than half of respondents in any ethnic group sleep well most nights, with African Americans reporting the least sleep. About a third of adults said they get less sleep than they need to function at their best.
Lifestyle
Lost Sleep Can Never Be Made Up
A study finds that sleep lost over long stretches builds a debt extra weekend sleep cannot repay, with the effects on focus showing up most at night. The post adds advice for teenagers: a consistent bedtime before 10 PM and waking no more than two to three hours later on weekends.
Lifestyle
Teens lacking sleep more likely to suffer depression
A study in the journal Sleep of 15,659 adolescents found teens who regularly slept five hours or less were 71 percent more likely to suffer depression and 48 percent more likely to think of suicide. Researchers say teens need nine hours; participants averaged 7 hours 53 minutes.
Lifestyle
Lose Sleep, Gain Weight: Another Piece of the Obesity Puzzle
Angela Spivey reports that epidemiologic and experimental studies correlate shorter sleep with obesity, hypertension and other metabolic disorders, and that researchers increasingly tie this to circadian disruption from light, noise and round-the-clock schedules.
Miscellaneous
Newborn Babies Were NOT Designed to Sleep Alone
Dr. Jay Gordon argues babies sharing a bed with sober, nonsmoking parents are closely monitored and face a SIDS risk close to zero, while babies in separate rooms breastfeed less. Mercola traces the 2002 warnings against bed-sharing back to CPSC death records.
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