Runners know music can provide that extra oomph to make that last mile. The right music can relax us, put us to sleep, or heal us, so it makes sense it can also energize us. The Yamaha BodiBeat is part DJ, part heart monitor, and part trainer to keep you at your peak performance during workouts. Armed with new running sneakers and a snazzy outfit, I strapped the BodiBeat onto my arm and took to the Los Angeles jungle. My review after the jump.