Experiencing terrible leg and back stiffness after sitting. Once I walk I normally begin to loosen up. My right hip also keeps going out. If my right hip is not painful, then I have pain in right thigh. PT thinks it s an IT band issue. Also feel tightness in the back of my neck.
Hi. Stiffness after rest especially morning stiffness, can be due to one of the inflammatory joint diseases. It will help to see a Chat Doctor.  In the meantime" exercise is medicine". So do a bit more walking, 30 minutes a day at least 3 times a week, and stretch. Exercise will help with the tightness.