What is social jet lag and how does it occur?
What is social jet lag? Thanks for asking. You've probably heard of jet lag, the feeling of fatigue and disorientation that occurs when you travel across different time zones. But did you know that you can experience a similar phenomenon without leaving your home? It's called social jet lag and is caused by changing your sleep patterns. Can you explain that further?
Well, social jet lag happens when you change your sleep schedule on the weekend to fit your social life. So, for example, if you usually go to bed at 10pm and wake up at 6am on weekdays but stay up until midnight and sleep in until 9am on weekends… you have a social jet lag of three hours. This means that your natural sleep rhythms and your social time are mismatched by three hours.
Why is social jet lag a problem? Because it can have serious consequences for your health and wellbeing. According to a new study published in 2023 by King's College London, social jet lag can lower levels of healthy bacteria in people's digestive tracts,
This adds to the other known problems of disturbed sleep, which include increased risk of heart disease, obesity, diabetes, depression and anxiety.
It can also affect your mood, energy, appetite, immune system and hormone levels. It can make you feel more stressed, irritable, sleepy and hungry and even disrupt your memory, concentration and creativity. How can you best avoid social jetlag?
Well, the best way to avoid it is to keep a regular sleep schedule throughout the week and limit the variation in your bedtime and wake-up time to no more than one hour. A regular sleep schedule is important because it helps your body and brain function optimally.
When you go to bed and wake up at the same time every day, you establish a consistent circadian rhythm, which is the natural cycle of physical, mental and behavioural changes that occur in a 24-hour period. Your circadian rhythm affects many aspects of your health, such as your hormone levels, body temperature, metabolism, immune system, mood and cognitive abilities.
To create a regular sleep schedule, you need to determine how much sleep you need based on your age, lifestyle and individual preferences. The general recommendation for adults is to get between seven to nine hours sleep per night, but some people may need more or less. You can use a sleep diary or a sleep tracker to monitor your sleep patterns and find out what works best for you.
Once you know how much sleep you need, you can set a fixed bedtime and wake-up time that allows you to get enough rest every night. You should stick to this schedule as much as possible, even on weekends and holidays. If you have to change your sleep schedule occasionally due to travel, work or social events, try to limit the difference to no more than an hour.
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