I find these to be excellent for shoulder and arm exercises. Check out the video to see three of my favourite moves to do with them. There are different types of chest expanders available. Some have metal springs and some are rubber. I find the rubber ones to be much better both for safety and also for feel. I bought mine from Lifeline USA. However any type will do. As with all resistance band exercises, you must maintain tension at all times and not let it go slack. This will allow you to get the most benefit from it. Anyway here's…