The Rib Cage Role Your rib cage should expand and compress with each breath, rotate with torso movement, and provide stable attachment for shoulder function. When ribs stiffen, breathing diminishes, rotation restricts, and shoulder mechanics suffer. These five signs indicate rib cage stiffness. The 5 Signs 1. Breathing That Does Not Expand Your Sides Full breathing should expand the rib cage laterally. If breathing moves only your chest or belly without side expansion, rib mobility has decreased. 2. Limited Torso Rotation Ribs articulate with the spine during rotation. Stiff ribs limit how far you can turn. Decreased rotation indicates rib cage restriction. 3. Upper Back That Feels Like a Single Unit Individual rib movement creates segmental thoracic mobility. If your upper back moves as one block rather than in segments, rib stiffness has developed. 4. Shoulder Blade Movement That Feels Restricted Shoulder blades glide on the rib cage. Stiff ribs prevent this gliding, restricting shoulder blade and therefore shoulder movement. 5. Constant Desire to Stretch or Crack Your Upper Back The urge to stretch or crack indicates joints seeking movement. Rib stiffness creates this sensation as costovertebral joints lose normal mobility. Start your 14-day free trial for rib mobility programs. Rib Cage Mobility Exercises Thoracic Extension JME 171 Sitting in your chair, raise one leg up and in front of you. Then, bend at your knee to find 90 degrees and then return to a straight position. Thoracic Rotation JME 170 Find stability by holding onto the back of your chair or desk. Bend at your knee to raise your leg backward - as high as your are able to - and return to the floor. Spine Mobilization JME 172 Sitting in your chair, internally rotate your legs toward each other. Be controlled with your movement and find your end range of motion. Mobilizing the Rib Cage Rib mobility requires thoracic spine work plus specific breathing exercises that emphasize rib expansion. Deep breathing with focus on lateral expansion gradually restores rib cage mobility. Start your 14-day free trial and mobilize your rib cage with simplmobility.