Flying can be uncomfortable at the best of times. With small seats, little legroom, and hours of inactivity, plane passengers often struggle to find a good position.

Many travellers instinctively cross their legs on a flight, but health experts warn this habit could be harmful.

According to the Daily Mail, physiotherapist Bethany Tomlinson explains why it’s a bad idea, and what you should do instead to stay comfortable and safe on your next trip.

Why crossing your legs on a flight is risky

Tomlinson explains that crossing your legs in the air increases the risk of joint pain and deep vein thrombosis (DVT).

Deep vein thrombosis is a type of blood clot that can develop when sitting still for long periods. Flying already makes you more vulnerable due to cramped seating and reduced movement, and crossing your legs only makes circulation worse.

To protect your joints and reduce the risk of DVT, Tomlinson recommends:

• Keeping legs slightly elevated: If your seat has a footrest, use it to raise your legs and improve blood flow.
• Sit back and relax your shoulders: Proper posture supports your back and reduces strain.
• Move every 1–2 hours: On long-haul flights, walk around the cabin to prevent stiffness and swelling in your knees, hips, and ankles.

The physiotherapist also revealed a few mobilising exercises that passengers can do from their plane seat, including neck stretches, shoulder rolls and knee hugs.

How do you usually sit on a plane?

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