August 30, 2011 3:18 pm Strenghten Up Your Knees To Stay Injury Free Toe raises and heel walks are great warmups to help build up muscle around your knees & ankles. Local 2:17 Misconceptions persist around plant-based eating 2:27 Mental Health Monday: Experts offer tips to manage financial stress 2:14 Non-profits, health systems team up to address gaps in care, social services on Chicago's West Side 2:11 Mental Health Monday: Kids using social media to self-diagnose mental health conditions, survey says 2:01 Chicago measles outbreak spreads as case count surpasses 50