Reese Witherspoon has been all about her fitness lately, and yesterday she was smiling widely as she left her gym in LA. As Elle Woods said, "Exercise gives you endorphins. Endorphins make you happy" and from the looks of Reese post workout, she seems happy there. Of course recently being nominated for a Teen Choice Award also helps. Reese was flying solo in her mostly black outfit, but since last Sunday when she took Jake to yoga, hopefully there is more couples fun in store for the coming weekend.