Performance Inhibitor and other things to hold you back. Stress. Yes, stress can tremendously hinder the body functioning. Studies show people whose brain has stress, regularly perform worse physically than those without it. So what exactly can a person do to fix the problem? Personally, I agree with a suggestion I ran into while reading the new "ID" magazine. Create a positive mental image in your head and focus on that when you are facing stress. What would or do you do to help handle stress?