Jennifer Lopez‘s “life revolves around exercise,” a source told Life & Style exclusively, but now, something else is sharing the spotlight. J. Lo got a new fiancé recently when Alex Rodriguez asked her to marry him, but it looks like he’ll be more than just a husband — he’ll be a gym partner! The couple left the gym in Miami again together on March 15, and it’s good that he has just as much interest in fitness as her, because it’s “her obsession!”