Does anyone know of a good stretch for the deltoid and lat muscles?

Hang from a tree…

This isn’t really a stretch but one of the best things I ever came across is the overhead lift. I can’t remember the exact name, but, laying flat on the floor on your back take a light weight bar and extend your arms above your head. Lift the bar with your arms straight and outstretched from the floor to just over your waist. Lower back to the floor above your head. Do as many reps as you feel comfortable. Work your breathing as well.Great for increasing lung capacity.