This Core Cross Training workout with Tanja Djelevic fuses functional exercises with the Balance Ball to increase flexibility and core strength through balance and endurance moves. Challenge yourself in this invigorating workout featuring the highly effective 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. The first one focuses on the lower body and the core, the second on the upper body, and the third on the abs and back.