Hagerman, Patrick S. <br/><br/>
The complete idiot's guide to core conditioning / 
illistrated by Patrick S. Hagerman. 
 - New York :  Penguin Group,  c2006. 
 - 290p.  : photos 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Abdominal exercises<br/>Back exercises