hi, whenever i sit for studying especially in the evenings , there is a kind of sensations in my body for streching .Therefore i study nowadays while standing. Even then there is urge to contract my hips and buttock muscles or back. Earlier i used this to discard as more energy.But what is it?
Hello, When you sleep, your muscles lose tone and fluid tends to pool along with your back. Stretching helps to massage fluid gently back into the normal position.  Also, your muscles protect themselves from over-extension by inhibiting the nerve impulses as they approach their limit. Causes are lack of physical movement lead to the urge to stretch, deny Chat Doctor.  Until examination is done it is difficult to say what it is.