AvatarNathan Richer

this dailyRX from Dr. T is pretty good mini discussion and treatment of the diaphragm:

yes and try working around the scapula, pecs, shoulder, serratus, lats. make sure also that you have good t-spine mobility. i just found some unknown tightness in my lower pec major (was only smashing the large known area, but missed the lower edge) and some knots in a back lower rib area and rhomboid/trap, as well as in my bicep which i never hit. all these were impacting my left shoulder but i hadn’t worked those areas enough to find the hidden problems, so keep searching with your lacrosse ball or favorite tool up/down stream and all the way to the spine and pelvis.