How Changing Clocks Twice a Year Increases Risk of Strokes and Obesity Every year, Americans adjust their clocks twice, springing forward and falling back. But a new Stanford study reveals that this biannual time change isn’t just an inconvenience; it causes serious health problems nationwide, like strokes and obesity. #SciencePulse #DaylightSavingTime #PermanentStandardTime #StanfordStudy | Asianet Newsable | Facebook