Home > Lifestyle > How to travel safely > General travel advice 05 August 2011 Stretch those calves Sitting for long periods raises risk of Deep-vein thrombosis (DVT), which is when a blood clot forms in deep-lying veins, usually in the legs 0 Quiz Wilderness Survival Skills » Ask EnviroHealth Expert » Assess Test your sun sense » Join Heart to Heart » 8 healthy snacks to fill you Weird things found in airport security Sitting for long periods raises risk of Deep-vein thrombosis (DVT), which is when a blood clot forms in deep-lying veins, usually in the legs. Stretch your calves with up-and-down foot movements and take mini-strolls on long flights to reduce risk. NEXT ON HEALTH24X Playing hard to get? These types of people might be into that 2020-07-13 20:45 More: How to travel safelyGeneral travel advice advertisement Read Health24’s Comments Policy Comment on this story 0 comments Comments have been closed for this article. Logout Comment 0 characters remaining Share on Facebook Loading comments... Live healthier Lifestyle » E-cigarettes: Here are five things to know E-cigarettes have become hugely popular in the past decade, but a rash of vaping-linked deaths and illnesses in the US is feeding caution about a product that's already banned in some places. Allergy » Ditch the itch: Researchers find new drug to fight hives A new drug works by targeting an immune system antibody called immunoglobulin E, which is responsible for the allergic reaction that causes hives.