Nicole Richie layered a leather jacket over her stylish gym gear as she left her gym in LA earlier today carrying a juice drink. Her fitness kick started a few weeks back before her lavish December wedding to Joel Madden, and since then she's been keeping up with her dedication to exercise. Nicole may need the extra energy boost she's getting from her workouts in the months to come as she gets ready to launch another Winter Kate collection and celebrate turning the big 3-0. If you need help sticking to your New Year's resolution, join FitSugar's 2011 Health and Fitness Challenge for tips, tricks, and a chance to earn their grand prize fitness package!