Though it enjoys to sit or lie down from time to time, the human body is made for moving not sitting. It’s all hardwired in our biology. Inside, there are about 360 joints and about 700 skeletal muscles that enable easy, fluid motion. Our skin is stretchy. The blood circulates best when the body is upright. Basically, every cell in our body itches for a walk. But when you sit down for too long, all sorts of health problems can arise from back and muscle pain, to more threatening long-term problems like hearth disease or cancer. I’ll leave you to Murat Dalkilinç in this extremely enlightening, but also practical TED animated video.