Unless you’re flying first class, you’re likely to be confined to a small, cramped seat, where stretching or frequently moving your legs may not be an option. Many people also sit cross-legged ...

A towering 5,000 feet high, with more than 7,000 steps, Mount Tai, in the eastern Chinese province of Shandong, is known for turning legs to jelly for anyone game for scaling to the top.

To avoid this, swop legs - or try not to sit cross-legged at all. * If you're constantly answering the phone, you tend to hold it to the same ear, inclining your head to one side. In time ...