My shoulder range of motion hasn't always been the greatest. As you can see from the bottom frame, there's a pretty hard stop that prevents my arm from reaching the ground. Lowering my legs (which should slacken my lats and therefore help my arm reach the ground) doesn't improve it. So I have a tight lats, but is there something else also contributing to the problem? # As I perform shoulder flexion in the upper video, although my low back doesn't hyperextend another compensation is apparent: my rib cage flares upwards. I don't have good separation between my humerus and shoulder blade, so the latter excessively tilts backward to get my arm to a vertical position, and my tight lats go along for the ride. # There's a strong possibility my pec minor is a culprit. In the top video, you'll see the skin overlying my right chest muscle begin to move first, which can be indicative of the dysfunctional pec minor that lies deeper. The muscle originates on the coracoid process of the scapula and has branches that connect to the 3rd, 4th and 5th ribs, which makes the case for an overactive pec muscle leading to excessive rib cage elevation. # Questions/comments/agree/disagree? Lemme know your thoughts, especially if you see something I may have missed!