Doctors explain why you may feel sluggish on flights and hourly measures to ease it

Medical experts say disrupted routines, cabin pressure, dry air, processed salty meals and prolonged sitting can contribute to sluggishness, bloating and dehydration on long-haul flights; they report that measures such as staying hydrated, choosing lighter meals and moving periodically are commonly recommended.

Many passengers begin long-haul flights feeling productive, only to report sluggishness, bloating and tiredness later on. Medical experts were consulted to explain why these symptoms often occur during air travel and to outline commonly reported ways clinicians address them. They point to disrupted daily routines, cabin environmental factors and the composition of airline meals as contributing causes. The following sections summarise those observations and reported recommendations. Key points: - Experts say changes to routine and eating times can disrupt digestion and contribute to tiredness. - Doctors report that lower cabin pressure, reduced oxygen levels and very dry air at altitude can affect energy, skin hydration and digestion. - Specialists note that airline meals are often higher in salt, carbohydrates and processed ingredients, which can promote water retention, a feeling of fullness and sleepiness. - Consulted clinicians warn that alcohol and caffeine may heighten dehydration and sleep disturbances and that they can influence reflux and blood sugar responses, as reported. - Clinicians observe that prolonged sitting can reduce circulation and slow gut transit, increasing the likelihood of bloating and constipation. - Reported recommendations from the experts include drinking water regularly, selecting lighter or balanced meals and moving around the cabin periodically to support circulation and digestion. Summary: These factors can combine to make some travellers feel fatigued, bloated and uncomfortable during long flights. Undetermined at this time.