I am having pain in delta region of my left shoulder, lower back and muscle of my left thigh. I had muscle pull around 4-5 years ago which I treated with medicine and physiotherapy but still both the muscles are weak and whenever I start working out it starts paining. There were some noise in my left shoulder when I was working out so I stopped working out for a weak used oil for pain and now that noise is not coming but still having a little pain in my shoulder when I exercise. How should I strength my muscle of left shoulder and left thigh as well as pain in my back.