I've been reading Starting Strength by Mark Rippetoe to improve the form of my lifts. It's done wonders for my squat. I no longer hate squats, thanks to him. However, I cannot do presses as he describes thus: "The lockout position is correct when there is a perfectly vertical relationship between the bar, the glenohumeral joint, and the mid-foot." My shoulders are so tight (and always have been, to my recollection) that, when I raise my arms up "over" my head, they are actually forward of my head by a good 15 to 20 degrees. If I lie down on the floor with my arms by my side and raise my arms up off of the floor in an arc until they stop, they stop well before they reach 180 degrees unless I really arch my back. I do have very mild kyphosis, so perhaps that is contributing to the issue. In any case, I'm trying to do some stretches that will give me more shoulder flexibility to complete the press better. Do you have any suggestions for the best stretches for this problem?