1. Emotional train wreck
People react more emotionally to life stressors when they’re tired, say researchers from the University of Arkansas.
2. Brain fuzz
Yes, decision-making and concentration abilities go kaput when we don’t sleep enough, but researchers at the University College London MedicalSchool now say that sleeping too little can also age your brain by seven years.
3. Memory fog
A 2014 study in Psychological Science says just one night of disturbed sleep can cause major distortions in memory.
4. Sad face
According to new research in Sleep, common giveaways of a restless night include droopy, swollen red eyes; pale, wrinkly skin; and an aura of sadness.
5. Immunity breakdown
Researchers at the University of Helsinki say insufficient sleep ramps up your body’s inflammatory response and compromises your immune system.
6. Cell damage
Up late last night? Think of your cells! Scientists at the Medical College of Wisconsin have linked sleep loss with cell damage, particularly in the liver, lungs and small intestine.
7. Weight gain
Forget potato chips — that snug waistband may be due to sleep deprivation. A recent study in the American Journal of Human Biology says lack of sleep inhibits the hormones that regulate our appetites and increases our risk of obesity.
8. Lagging libido
Research in the Journal of Sexual Medicine shows women with sleep apnea (when your breathing repeatedly stops and starts) have higher rates of sexual dysfunction. Meanwhile, a recent study by researchers in theU.S. shows women who sleep an extra hour are 14 percent more likely to havesex the next day.
9. More pain, less gain
Poor sleepers have a heightened sensitivity to pain, says a recent study in the journal Pain. Ouch!
Your all-day guide to better sleep
Can’t sleep? Maybe you’re overthinking it