Long-haul flights can place additional stress on the body, especially on the vascular system. Doctors warn: hours of immobility and dry air in the cabin can worsen blood circulation, causing swelling, fatigue, and heaviness in the legs. However, simple measures can significantly reduce these risks.
Why Flights Affect Blood Vessels
During long flights, passengers spend several hours almost immobile. As a result, blood can pool in the lower extremities, increasing the risk of thrombus formation — a condition known as deep vein thrombosis.
According to the World Health Organization, the risk of venous thromboembolism increases about twofold after journeys lasting more than four hours, although such cases remain rare overall — about one in 6000 passengers.
The main reason is prolonged sitting and limited space, which hinders normal blood circulation.
More Movement — Less Risk
Experts advise against remaining stationary throughout the flight. Even simple activity helps improve blood circulation.
Doctors' recommendations include:
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periodically standing up and walking around the airplane cabin;
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changing body positions;
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performing simple exercises for the feet and calves right in the seat.
Such actions activate the leg muscles, which work as a natural "pump" and help blood return to the heart.
Drink Water and Avoid Dehydration
The dry air in the airplane cabin can exacerbate dehydration. A lack of fluids, in turn, worsens blood circulation and increases the likelihood of thrombus formation.
Therefore, specialists recommend drinking more water during the flight and limiting alcohol and caffeine as much as possible, as they can enhance fluid loss.
Comfortable Clothing and Special Socks
Another important factor is clothing. Tight pants or shoes can impede blood flow. Doctors advise choosing loose, comfortable clothing for the flight.
Also, during long flights, compression stockings or socks can be beneficial. They apply gentle pressure to the legs, improving blood circulation and reducing the risk of thrombus formation.
Who Should Be Especially Cautious
Medical professionals note that there is an increased risk of vascular problems during flights for certain groups of passengers. These include:
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people over 60 years old;
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pregnant women;
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individuals with varicose veins;
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smokers;
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passengers with obesity or a history of thrombosis.
In such cases, it is recommended to consult a doctor before long flights.
...A long flight does not necessarily have to be accompanied by fatigue and swelling. Simple measures — movement during the flight, adequate water intake, comfortable clothing, and, if necessary, compression stockings — help maintain normal blood circulation and protect blood vessels during travel.
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