This Core Cross Training workout with Tanja Djelevic uses your body-weight with the Balance Ball to increase core strength and flexibility through key balance and endurance moves. Challenge yourself in this invigorating and highly effective workout featuring unique moves with the Balance Ball. In addition to getting toned, these exercises are designed to mimic daily activities to avoid the risk of injury and to give you ease and grace in your everyday movements. Each 20-minute workout focuses on a different area of the body. This is the third part in a series focusing on the lower body and the core, the upper body, and the abs and back.