The Hidden Health Risks of Jet Lag

The Hidden Health Risks of Jet Lag

Most of us think of jet lag as a few bad nights and a foggy head. For an occasional holiday, that’s about right. For frequent flyers, the picture is different.

It’s not just tiredness

Jet lag is circadian misalignment: your internal body clock is out of step with the world around you. Your clock doesn’t only govern sleep. It coordinates hormones, metabolism, blood pressure and even how your brain handles reward and stress. When it is repeatedly thrown off, the effects spread well beyond sleepiness.

Much of the research comes from shift workers and people with chronically disrupted body clocks, rather than from single trips. But frequent business travellers share the same underlying problem, and three risks stand out.

Addiction

Disrupted sleep and body clocks are associated with a greater risk of problematic substance use. Add the common jet lag habits of alcohol to wind down, caffeine to push through and sleeping pills to force sleep, and it’s easy to see how reliance can build.

This is also an organisational culture issue. Free drinks in the airport lounge, alcohol on the flight, and client dinners that run late are all treated as part of the job. For a traveller whose body clock is already out of step, that culture makes the risky habit the easy default. Organisations that expect their people to travel have a duty of care to notice it, and to stop treating the lounge bar as a perk with no downside.

Type 2 diabetes

Your body handles blood sugar differently at different times of day. When your clock and your eating and sleeping patterns are mismatched, insulin sensitivity and glucose control can worsen. Over years of frequent disruption, that increases the risk of type 2 diabetes.

Cardiovascular disease

Circadian disruption has been linked to higher blood pressure and an increased risk of heart attacks and strokes. Your cardiovascular system follows a daily rhythm, and repeatedly forcing it to operate out of sync adds strain over time.

What this means for frequent travellers

One trip won’t cause any of this. The risk is cumulative, and it builds for people who cross time zones again and again with no strategy for resetting their clock. That’s the good news too: this is a risk you can manage. Timing your light exposure, sleep and meals to your own circadian rhythm helps your body adjust faster and reduces the toll of each trip, without relying on drugs or a drink.

If you travel often and want a plan tailored to your body clock, book a session with me on EveryExpert.