Multidirectional Instability (MDI) of the shoulder is when the shoulder joint dislocates and/or subluxes in more than one direction. Shoulder strengthening exercises have been shown to help reduce pain and subluxations in people with MDI. This project is about comparing two different exercise programs for people with MDI of the shoulder. The results of the project will assist in establishing which exercise program is the most effective for people with this type of shoulder condition.