Let’s start with a small experiment. Sit on a normal chair, and then on a very low chair or on the ground. Do you feel a difference in your hip joint? On the low chair, it feels tight, compressed, and even painful after a short while – this is called a closed posture. There is great pressure from one bone against the other. Hence, the cartilage wears off quicker, and all the tissues (muscle tissues included) are more tense.