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Morning sunlight and a short walk: a simple daily anchor for your body clock

Some of the most useful health habits are also the plainest. Step outside soon after you wake, walk for a little while in the daylight, and come home. No equipment, no app streak, no special shoes.

This week, body+soul looked at the best time of day to walk, and made the case that morning walks help anchor your circadian rhythm through exposure to early daylight. With spring mornings getting brighter, it's a good time to try it. Here's how your body clock works, why morning light matters, and how the Thrive Health Band can help you see whether a morning walk shows up in your sleep.

What your circadian rhythm does

Your circadian rhythm is your body's internal clock. The Sleep Health Foundation explains that it makes you feel sleepy at night and awake during the day, and helps regulate things like body temperature and hormones, including melatonin, which is involved when your clock tells your body it's time to sleep.

The clock sits in a small part of the brain called the suprachiasmatic nucleus. Interestingly, it doesn't run on exactly 24 hours. Left to itself, it runs slightly long, at about 24.1 hours, so it needs a nudge each day to stay in line with the world around you.

Why morning light is the strongest signal

The Sleep Health Foundation says light is the most important external signal for your body clock. When your eyes sense light, they send signals that reset the clock every day, which stops your rhythms drifting out of line.

The timing of that light matters. The Victorian Government's Better Health Channel suggests getting enough early morning sunshine, because exposure to light during your early waking hours helps set your body clock. It also notes that morning exercise is a good choice, since the morning light helps us wake up.

Sleep experts quoted by news.com.au earlier this year made the same point, suggesting morning sunlight within the first hour of waking to strengthen your circadian rhythm.

Why pair it with a short walk

You could simply drink your coffee on the back step, and that counts. Adding a short walk brings two good things together: daylight and movement. It gets your steps started early, gives you a few minutes before the day's demands arrive, and is easy to keep up because it doesn't take much.

It doesn't need to be long or fast. A 10 to 20 minute loop around the block, a walk to the corner café, or taking the dog out a little further than usual all work. If you're counting, our article on how many steps a day you really need puts the numbers in context, and if you're sitting a lot during the day, movement breaks at work can add more.

How to make a morning light walk a habit

  • Aim for the first hour after waking. That's when light is most useful for setting your clock.
  • Keep the time roughly the same. A regular wake up time and a regular morning walk reinforce each other.
  • Make it easy to start. Leave your shoes by the door, or tie the walk to something you already do, like the school run or picking up a coffee.
  • Go with someone. A walking partner makes it more likely you'll head out on a grey morning.
  • Don't worry about missed days. One skipped walk changes very little. It's the run of mornings that counts.

If you work shifts or have a newborn, your mornings may not look like anyone else's. The same idea still applies: get daylight soon after your main wake up time when you can, and protect whatever regular anchors you have.

Stay SunSmart on spring mornings

Morning light doesn't mean skipping sun protection. Cancer Council Australia recommends sun protection whenever the UV Index is 3 or above, and in spring that can happen earlier in the morning than you might expect. UV can still be strong on cool or cloudy days. Check the sun protection times for your area in the free SunSmart Global UV app or on the Bureau of Meteorology website, and slip, slop, slap, seek and slide when you need to.

Morning light and social jetlag: how they fit together

If Monday mornings feel hard, our piece on social jetlag explains how late weekends shift your body clock. A morning light walk is the everyday part of the same picture: a daily anchor that helps keep your clock steady, whatever day of the week it is. On weekends, a walk soon after waking can also make a long lie-in less tempting.

How Thrive helps you see your rhythm

The Band has no screen, so on your walk there's nothing on your wrist asking to be checked. You can look at the sky, talk to whoever you're with, or simply think.

  • GPS walks through your phone. Start a walk in the Thrive app before you head out, with your phone in your pocket, and it maps your route and records your distance. Your walk history builds up over the weeks.
  • Steps and activity. The Band's motion sensor counts your steps and activity through the day, so your morning walk sits alongside the rest of your movement.
  • Sleep consistency. Thrive scores your sleep on Quantity, Quality, Regularity and Timing. Regularity shows how steady your bed and wake times have been, and Timing shows how the middle of your night compares with your usual, so you can see whether a regular morning routine is steadying your nights.
  • Your sleep timing over time. On My Health, Thrive's web portal, you can look at your sleep timing and chronotype over a longer period.
  • Correlations and experiments. Thrive's correlations engine shows what tends to go with your better nights. Try two weeks of morning walks as an experiment, then review what moved.
  • Your own normal. Thrive learns what's usual for you right across your health, from sleep, heart and activity to mood and food, so a change shows up against your own history.

You can ask Ask Thrive questions such as "How regular have my wake up times been since I started walking in the morning?" or "Do my sleep scores look different on days I walked before 8am?" It shows patterns, not causes, and it doesn't give medical advice.

When to talk to your GP

Morning light is a helpful habit, not a fix for every sleep problem. If you're often exhausted despite a regular routine, or poor sleep is affecting your mood, work or driving, it's worth talking to your GP. Our guide to getting ready for a GP appointment with Ask Thrive shows how to bring your sleep pattern along.

Before you buy

You'll need a compatible iPhone or Android phone. Download the Thrive by Optihealth app from the Apple App Store or Google Play; the app stores are only for downloading the app, and you buy the Band and your Plan at thrivehealthband.com.

A$660 for Thrive Health Band with 12 months of the Thrive plan included

Free Australia-wide shipping during the launch offer (usually A$14.99).

After 12 months, the plan is A$240 a year or A$29 a month, with no lock-in.

You're also covered by a 12-month Thrive Care Warranty, and consumer guarantees under Australian Consumer Law always apply.

Get Thrive and see how your mornings show up in your nights

Common questions

When is the best time to get morning sunlight?

Soon after you wake. Better Health Channel says light in your early waking hours helps set your body clock, and sleep experts often suggest the first hour after waking.

How long should a morning walk be?

There's no magic number. A short walk of 10 to 20 minutes is a realistic place to start, and the habit matters more than the distance.

What is a circadian rhythm?

It's your body's internal clock, running on a cycle of about 24 hours. It helps control when you feel sleepy and alert, and daylight keeps it in step with the day.

Does Thrive track walks with GPS?

Yes. Start a walk in the Thrive app and it uses your phone's GPS to map your route and record your distance, while the Band keeps taking readings.

Sources

Thrive is intended to support general health, fitness and wellbeing. It is not a medical device and does not diagnose, treat or prevent any condition. If you're concerned about your health, talk to a qualified health professional.