11/08/2025
What’s the common denominator here?
Whether we are turning the clocks back, travelling across multiple time zones in a short amount of time, or switching up our bed and wake times at the weekend, this shift in our light exposure, or lack thereof, is one of the biggest influencers on our circadian rhythm, and in turn, our sleep/wake cycle.
Your circadian rhythm is connected to a master clock which is located in your brain and this master clock is directly influenced by environmental cues, especially light.
So, when we alternate the amount of light we’re exposed to, even by just an hour, it can have a profound effect on our sleep (such as sleep deprivation or insomnia), as well as other systems in our bodies due to the misalignment of our circadian rhythm.
Your body likes consistency and routine. When you go to sleep and wake up at around the same time each day, and get bright light during the day and limit light exposure at night, your circadian rhythm will be strong and your body will come to anticipate sleep and waking on the routine that you set for it.