Want a Good Night's Sleep? Switch off Smartphones

  • english.chosun.com

    July 17, 2015 10:39

    As the summer nights grow hotter, more people have trouble sleeping. What can you do to address the problem and get a good night's sleep?

    Don't keep your smartphone near the bed. Ringtones can keep you from sleeping soundly, so put your phone in "silent" mode during your sleeping hours, or just leave it somewhere far from your bed.

    Don't believe those who tell you that coffee only affects your sleep if you drink it right before you go to bed. One cup of coffee contains 80 to 120 mg of caffeine, which can stay in your system for up to 12 hours. Decaffeinated coffee is not always safe, either; some brands contain as much as 20 mg of caffeine.

    Herbal teas such as peppermint and chamomile also contain some caffeine, and are best avoided near bedtime.

    Try not to watch TV or use a tablet PC immediately before going to bed. In general, you should avoid using electronic devices that emit light for at least an hour before bedtime.

    Blue light emitted by TVs, computers and smartphones interferes with your body's secretion of melatonin, a hormone that helps to bring on deep sleep.

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