The discrepancy in sleep–wake timing between workdays and free (non-work) days due to modern work schedules possibly causes mild circadian misalignment between endogenous circadian rhythm and the sleep schedule imposed by social obligations.
State the details of Clinical Trials: Name: Effect of acute social jetlag on risk factors of lifestyle-related diseases. This phenomenon may correspond to increased central arterial stiffness. These results suggest that even acute SJL augments morning BP surge. Furthermore, a significant positive correlation was found between ΔcfPWV and Δmorning BP surge ( R = 0.587, P = 0.004). Carotid-femoral pulse wave velocity (cfPWV) and morning BP surge on Monday in the SJL trial were significantly higher than those on Friday in the SJL trial (cfPWV: P = 0.001, morning BP surge: P < 0.001), and those on Monday in the CON trial (cfPWV: P = 0.007 morning BP surge: P < 0.001). SJL (average mid-sleep time on weekends – average mid-sleep time on weekdays) occurred only in the SJL trial (SJL: 181 ± 24 min vs. The ambulatory BP was automatically measured during the sleep and awake periods for 2 h after the participant woke up at night before pre- and post-intervention measurements. Pre- and post-intervention measurements were performed to evaluate resting cardiovascular variables on Friday and Monday mornings, respectively. Participants in the control (CON) trial implemented the same sleep-wake timing as on weekdays.
In the SJL trial, participants delayed their bedtime by three hours on Friday and Saturday nights.
This randomized crossover trial recruited 20 healthy men. We focused on the acute effects of SJL on morning blood pressure (BP) surge. Although social jetlag (SJL) is generally considered a chronic condition, even acute SJL may have unfavorable effects on the cardiovascular system.
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