Meet your favorite new training partner: Garmin's Forerunner 620. To start with, the 620's large, hi-resolution, color touchscreen features customizable data fields that allow you to keep it simple or choose from a wealth of stats including distance, pace, and time. With Garmin Connect, you can upload your workouts for logging and analysis, download workout files to your GPS, and even share your latest adventure through your favorite social media website. Paired with your smartphone (iPhone 4S or later, sold separately) via Bluetooth, this on-hand coach enables live GPS tracking so your friends, family, or coach can follow your progress during workouts or races. The 620 will inform you when you've set a new personal record, and it even offers vibration or audio alerts to keep you on pace. Plus, it's ANT+ compatibility allows you to use Garmin's Heart Rate-Run monitor (sold separately) for additional valuable information: heart rate, calories burned, recovery time, V02 max estimates, cadence, ground contact time, and vertical oscillation.