A long time ago, airlines showed exercise videos on long-haul flights, including those crossing the Pacific, to keep passengers active and prevent deep vein thrombosis (DVT). However, that tradition has largely been abandoned even as airlines increasingly rely on narrow-body planes such as the A321neo and 737 MAX to Hawaii, which further restrict passenger movements.
Concerns persist about the health risks associated with prolonged immobility aboard airliners, where it is not easy to stand up and stretch. The FAA has even created a DVT brochure, which you will find at the end of this article, to advise passengers before their flight.
DVT is a potentially fatal condition in which blood clots form in the legs and is a significant problem for passengers on extended flights. The limited space and movement restrictions on these planes add to the challenge of staying active.
What the research says about flights lasting more than four hours.
The US Centers for Disease Control (CDC) has confirmed that flights lasting more than four hours pose a risk of clots, especially when combined with dehydration and inactivity. Concern is heightened for passengers traveling where movement options are even more restricted and standing areas are limited. Even getting on and off a single-aisle plane can be a challenge with service carts getting in the way.
Research has long linked long-haul travel to an increased risk of deep vein thrombosis. Another study published in the Journal of the American Medical Association found that once flight durations were extended to eight hours or more, the risk of developing venous thrombosis doubled among passengers, especially those with risk factors. such as obesity, age over 45 and a history of bleeding disorders. The study highlights that prolonged immobility and dehydration are key elements increasing the risk of blood clots.
Challenges on narrow-body aircraft.
A traveler recently shared his experience saying:
“Amidst all the ever-shrinking seat spacing on long, narrow-body journeys is the increased risk of DVT and the subsequent potential for pulmonary embolism. I’ve had everyone’s unfortunate experience, and it’s important to move and stay hydrated, which includes having to move around in a cubicle with little space to lie down. — Commentator BOH CL.
Reduced seat spacing and long flight times make it difficult to comply with recommended in-flight health measures. Studies show that restricted movement, lower humidity levels in the cabin, dehydration and prolonged sitting slow circulation and increase the risk of clots. The Federal Aviation Administration warns that these risks are of particular concern for travelers with pre-existing health conditions.
One of our readers wrote: “It’s almost impossible to get around on these planes. I was barely able to get up once or twice during the entire flight to Honolulu.
This lack of mobility makes it essential that passengers be proactive in preventing DVT.
Preventive measures for travelers.
While airlines provide little support for proactively combating DVT risks, travelers can take several steps to reduce their risk of developing blood clots during flights to Hawaii. The American Heart Association recommends wearing compression socks, which help promote circulation and prevent swelling. Studies confirm that these socks significantly reduce the risk of clots, especially for travelers at higher risk. Learn more about compression socks and flying.
Staying hydrated is another key preventative measure.
Low humidity in airplane cabins can contribute to dehydration, which thickens the blood and increases the risk of clotting. Drinking water regularly throughout the flight and reducing alcohol and caffeine can help maintain healthy circulation.
Simple seated exercises can also make a difference. Leg stretches, ankle circles, and foot push-ups can keep blood flowing even when it’s difficult to stand and walk. A study in The Lancet found that passengers who made frequent movements in their seats had a significantly lower incidence of travel-related thrombosis.
Should Hawaii airlines do more?
Although one airline, Qantas, has been a leader in introducing in-flight exercise videos and wellness programs, most airlines serving Hawaii have yet to implement initiatives similar. More proactive measures could include providing educational materials in seat back pockets, offering reminders via on-board announcements, and encouraging passengers to move when it is safe to do so.
Such initiatives would align with passengers’ growing awareness of in-flight health risks and their desire for a safer, more comfortable travel experience, particularly to an arguably health-focused destination like Hawaii.
As future research sheds more light on the link between air travel and DVT, airlines and passengers are responsible for prioritizing in-flight health. Will travelers have to deal with these risks independently, or will airlines help them by introducing more comprehensive health initiatives?
Please share your thoughts.
Deep vein thrombosis
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