They named it the startle reflex. 

An automatic survival response triggered by sudden noise or movement, it’s the body’s built-in emergency alarm.

Eyes wide open, muscles tense, heart rate spikes – it’s one of the fastest defensive reflexes in the human body. Designed to mobilise us in sudden danger, it’s the reason our ancestors could respond immediately when a predator appeared from the darkness.

For tens of millions of years, this reflex meant danger.

Now it’s how we start our mornings.

The Original Design

Waking up is supposed to happen gradually.

For almost all of human history, it went something like this. Light arrived slowly, shifting the sky from black to blue to gold. Temperature rose by a degree or two. Birds started singing – not all at once, but in overlapping waves that built across the hour before sunrise.

The human body was gradually invited to consciousness, not violently dragged into it.

The transition between sleep and wakefulness is a delicate neurological handover. At some point we decided it would be a great idea to aggressively speed it up.

When the brain is abruptly jolted from deep sleep, we tend to enter a state known as sleep inertia – a period of grogginess, slowed thinking and impaired decision-making that can last anywhere from a few minutes to over an hour.

But the first signal the brain receives really matters – how we wake up affects baseline stress levels for hours afterwards. A calm wake-up allows the nervous system to settle into the day gradually – a sudden one tells the brain something’s wrong.