The summer sees lots of people jetting off to exotic countries and passing through multiple time zones.
I’ll be one of them. The trouble is, I spend far too much of my life doing this, mainly while making documentaries. So I am, naturally, obsessed with jet lag.
Jet lag is caused by a mismatch between external time cues (the Sun is rising, it must be morning) and our internal, circadian clock. The circadian clock plays a vital role in regulating a range of things, such as your sleep/wake cycles, and which hormones get secreted and when. Jet lag, which messes with your circadian rhythm, can do some pretty awful things to your body and your brain. It not only makes you feel knackered, but lots of long-distance travel can trigger sleep disorders and encourage obesity.
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