Ankylosing spondylitis (AS), also called axial spondyloarthritis, can cause stiffness in the neck and shoulders. Neck and shoulder pain might get worse after lying or sitting for a time, causing ...

Flexion or extension of a certain body part typically refers to joints. Flexing a joint usually means closing it, and decreasing the angle between the body parts, while extending a joint means opening ...

Arthritis, a condition that was only associated with old age, is now turning to the younger generation. Specialists say that ...

To fix your posture, it's important to strengthen the back muscles and stretch the chest muscles daily. You should also spend more time walking.