Half of Americans have a destructive, inconsistent sleep schedule when going from weeknights to weekends in a phenomenon experts are calling 'social jet lag.'The journal JAMA Network Open published the study Tuesday in an attempt to define 'the mismatch between a person’s biological time, which is determined by circadian rhythms' and their supposed 'body clocks' and 'social clocks.''Body clocks' are driven by professional obligations like work and school, while 'social clocks' measure extracurricular activities.
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