OK, seriously, she’s 44 years old and she still looks like she did 20 years earlier! Either Jennifer Aniston has some powerful genetics, or she’s a devoted fitness nut hell-bent on angering women half her age with her enviable, oh-so-enviable, figure.  Of course we set out to find out how she keeps in shape, especially after watching the just-released trailer for We Are The Millers. We know, just from the tabloids, that she is a yoga fanatic, and while many of us have done a fare share of downward dog poses, we somehow still lack the sculpted definition of Ms. Aniston’s famous physique.http://youtu.be/TQ_5z3yhnsQThat’s because it takes dedication, motivation, and a balanced lifestyle that requires taking care of the body from the inside with the same meticulous diligence as the outside. Take it from the Smart Water spokesperson if you don’t believe us. So, what exactly is it that we should be doing differently?For help, we decided to turn to Jennifer Aniston’s personal fountain of youth, and her name is Mandy Ingber. She is a celebrity fitness expert, speaker and author of the ever-popular Yogalosophy: 28-days to the Ultimate Mind-Body Makeover. She’s also the fitness maven responsible for the super toned bodies of Kate Beckinsale, Brooke Shields and many other starlets, as if we weren’t jealous enough.Check out her professional site for fitness tips, nutrition information, and other types of healthy factoids. Follow her on Facebook and connect with her on Twitter to keep up with all the latest news. Just follow the links and get started with your new fitness regiment to get that enviable bod.Image Source: Wiki CommonsVideo Source: YouTube