Pneumatically-Powered upper body Exoskeleton

need you to find more information and pictures on arm and back injury from lifting heavy things in workplace. I need pictures that show muscle or joint injury on the arm, and pictures of people lifting heavy things in different types of jobs. As for the research, I need some medical information like what happens when a muscle is torn, how ling it takes to heal, etc. and works cited on all things you find Please, be attentive, as i need to re-write only the introduction! nothing