Many people prefer to sit crossing their legs, they feel it comfortable and it has become a habit for most of the people. But there are many claims that it is very harmful for human health, the most quoted harm if that it causes high blood pressure.
A detailed study was conducted at Hypertension Clinic in Istanbul which found that people who sit while crossing their legs had higher blood pressure, but after relaxing their legs the blood pressure become normal in 3-5 minutes.
Different conclusions were deducted from that research, many believed that crossing legs is not harmful because the blood pressure become normal while other believed that constant rise in blood pressure means more efforts by heart, which can make it exhorts.
Doctors also warn people with high risk of blood clot not to sit in such position because it increases the chances of deep vein thrombosis.