Having a forward shoulder posture, increased hunched over upper back, or forward head could be reduced by stretching and rolling out the pecs.
The pec minor attaches to the coracoid process of the scap, while pec major attaches to the upper humerus. If both are tight, together they have the capability to pull the entire shoulder complex forward and in turn your upper back as well.
So grab a mobility ball, or a tennis ball or a lacross ball, whatever is available...and let's begin!
Try this stretch out using a ball and the wall, you will find there may be a whole lot of tenderness in that upper pec than you would have ever believed!