Autoimmune diseases really throw the body for a loop. You're attacking your own tissues. Your inflammation is sky high. What's usually good for you—like boosting the immune system—can make it worse. You'll often restrict eating certain foods that, on paper, appear healthy and nutrient-dense. You take nothing for granted, measure and consider everything before eating or doing it. Sometimes it feels like almost everything has the potential to be a trigger. Is it true for exercise, too? Must people with autoimmune diseases also change how they train? (This Mark's Daily Apple article was written by Mark Sisson, and is narrated by Tina Leaman)