It doesn't matter if you're a fitness novice or an elite athlete, or whether or not you have a gym membership. Developing a strong core is key to maintaining good health and balance, and you can do it within the comfort of your own home. It can be difficult to know which exercises to do for different parts of the body without the expertise of a professional trainer. InExercise in Action: Core, fitness expert Hollis Lance Liebman shows everyone how to build a strong core and prevent injury.   * Gain a whole new perspective on your body and how to increase its performance. * Learn how to get a full-body workout without leaving your home.   Exercise in Action: Core provides you with everything you need to know in order to develop a strong body core.