Ever wonder why you wake up minutes before your alarm? Science reveals the reason | - The Times of India

The body's internal clock, regulated by the suprachiasmatic nucleus (SCN), anticipates wake-up time through circadian rhythms. Proteins like PER and hormones such as cortisol fluctuate, preparing the body for alertness. Consistent sleep schedules are crucial for synchronizing these biological systems, enabling a natural transition from sleep to wakefulness, often before the alarm sounds.