Most people think they’re just stretching their muscles. But what they often don’t realize is that they’re also "stretching" their nerves. And nerves don’t stretch the same way muscles do. In fact, the sensation of nerve tension is often mistaken for a muscle stretch especially in forward folds or deep hamstring positions because of the sciatic nerve being tensioned Pascimotanasana for example: – When your legs are straight, the sciatic nerve is already under tension. – When you flex your spine