4 Health Benefits of Waking Up Early, According to Doctors

The sun is the best alarm clock. And it will help you get into a quality long-term sleep-wake schedule.

"Getting light first thing in the morning helps set our circadian rhythm", said Annie Miller, LCSW and behavioural sleep medicine expert. The circadian rhythm is the body's internal 24-hour cycle that responds to changes in light."Having that light hit your eyes cues your brain that it's time to be awake".

Kicking off the day with early light also primes your body to settle down for sleep when it's dark. "Waking up early and having those cues first thing in the morning can also help the nighttime cues, making it easier to fall asleep", Miller said.

"People generally feel more productive early in the morning", Miller said.

There could be a few reasons for that, one of which is that early risers get to take advantage of the body's most naturally alert time. Cortisol, what we know as the "stress hormone", plays a role in stimulating wakefulness, Brendel explained.

The hormone's levels naturally ebbs and flows throughout the day, with "the peak for most people being somewhere around eight in the morning", he said. "Cortisol can work to promote wakefulness and alertness, so the healthiest and most productive thing is to try and align your behavioural and work schedule with these biological changes".

If you're a shift worker, your cortisol peak may happen at a different time of the day, depending on your sleep schedule.

An early wake-up call may also impact your metabolic health. A recent study found that people who wake up early utilise more fat during rest and exercise and are more insulin-sensitive than late risers. This may translate to a lower risk of Type 2 diabetes.

In addition, the study found that people who woke up early also did more physical activity in the morning and midday and were generally less sedentary throughout the day. And moving more can do wonders for your health, reducing the risk of everything from cardiovascular disease and anxiety to some cancers and more.

The circadian rhythm-regulating effects of waking up early can benefit more than just how rested you feel. It may also help regulate your mood and improve mental health. Research suggests that disruptions in circadian rhythm may exacerbate symptoms in people who are predisposed to mood disorders like major depressive disorder and anxiety. Though, bear in mind, mood disorders can also cause sleep disruptions—so it works both ways.

On the flipside, "one of the multitude of ways to treat depression is to establish sleep patterns that are more consistent with natural light and dark cycles", Brendel said.

In fact, he tells his patients that if there's only one thing that they change behaviourally in order to reduce depression, it should be establishing better sleep habits—specifically, getting on a sleep cycle that mimics the body's natural clock and exposes them to light early in the morning.

"From a clinical standpoint, people who make this change to shifting earlier—early to bed, early to rise—tend to do better with their mental health", Brendel said. And there's research to back him up: a 2021 study consisting of more than 840,000 people found that a preference for waking up earlier was associated with a 23 percent lower risk of major depressive disorder.