For scapula muscle activation and postural improvement following weakness in the area around the scapula, especially if your arm has been injured or in a sling, or you have had pain from the neck or shoulder into the scapula region. Having the band around your shoulder elimiates the need to hold the band in the arm meaning you don't have to load the shoulder or have a weight in you arm. This is good for people who are post-surgical and are either not allowed or don't want load through their hand and shoudler.