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Roughly 53 percent of Americans say they're too worn out at the end of the day to fool around, according to a poll by Consumer Reports. To power up your sex life, consider powering down your gadgets. New research indicates that the backlight from the screens of electronics may be the reason you're not getting a good night's rest (the light tricks the brain by simulating daylight, making you less likely to fall asleep). A study by the Lighting Research Center at Rensselaer Polytechnic Institute found that two hours of screen time before bed suppressed melatonin—the hormone responsible for regulating your sleep schedule—by about 23 percent.