I still think one of the greatest tools for training your shoulders and increasing mobility in this often injured joint is...a single plate! Here's another one for you to try. It's called the plate pendulum. It lights up literally every head of the delts at different points in the range of motion not to mention the muscles of the mid and upper back. Watch closely and you'll see the rush of blood to al these muscles come close to matching the deep red burn of the farmers tan on my neck!! Looks li