Dr. Rupy Aujla on Supporting Your Body Clock Through Shift Work and Jet Lag

Understanding Circadian Rhythm and Its Disruption

• 🧠 The circadian rhythm is our natural 24-hour internal cycle that governs sleep, hormone release, digestion, and immune response, with the suprachiasmatic nucleus (SCN) in the brain acting as the master clock, primarily set by light.
• ⚠️ Shift work, jet lag, and irregular sleep schedules lead to circadian misalignment, where the body's internal clocks are out of sync with the external environment, causing stress and increasing the risk of various health issues.
• 📈 Health risks associated with circadian disruption include a higher risk of type 2 diabetes (10% increase), obesity (25% increase), high blood pressure (30% increase), menstrual irregularities, painful periods, early menopause, and mental health issues like depression and anxiety.
• 💡 Even without shift work, modern lifestyles with artificial light at night and irregular schedules can disrupt our body clocks, with studies showing a link between artificial light exposure and increased obesity and disrupted metabolic flexibility.

Strategies for Shift Work and Jet Lag Preparation

• ⏰ Phase shifting involves gradually adjusting sleep and meal times, along with strategic light exposure, to prepare for a new schedule, taking 3-5 days to shift by 6-8 hours.
• ☀️ Light exposure upon waking is crucial for signaling the SCN; delaying light exposure helps shift the body clock later, while bright light during the new