<a href="http://www.cnet.com/2001-13388_1-0.html"><img src="http://i.i.cbsi.com/cnwk.1d/i/rev/lwt/promo_sports/lwt_sports_slideshow_header.jpg" width="312" height="46" border="0" alt="Sports tech: Best ways to watch and play" /></a><br />Being active and getting in shape isn't just about looking good--it's also about being healthy. Luckily, you needn't suffer through workouts in silent boredom--some upbeat music can provide the perfect motivation to get moving. We've rounded up the perfect selection of MP3 players and headphones for your next trip to the gym.