Infographic : How light affects your ability to sleep

Most of us experience insomnia at some point in our lives, finding it difficult to drift off and stay asleep despite having plenty of opportunity to. Typical causes of insomnia include stress and anxiety, but did you know that your gadgets could be to blame, too?

Our sleepiness and wakefulness throughout the day and night is regulated by our circadian rhythm. This is essentially our body clock, creating physical, mental and behavioural changes that occur in our bodies over a roughly 24-hour cycle. Circadian rhythms are found in most living things, including animals, plants and many tiny microbes, and are created by natural factors in the body. However, they also respond to signals from the environment, such as light, so that we remain in sync with the Earth’s rotation.

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