One: Your shoulders are weaker than your chest and tris. Do you do any. bench
Work out the chest with a bad shoulder with help from your friends at LIVESTRONG.com in this free video.
Most people start off chest workout with compound movements first.. As a result you're actually impacting your chest LESS and working oyur shoulders more.
That's why workout routines usually don't put chest and shoulders the same day: you use your shoulders heavily. Probably not since you are lifting less weight.
However there is a small bunch of chest exercises that have been medically proven to be a little less intense for people with shoulder pain. One of them is .