Similar to the 235, this tracker monitors activity, steps, distance, calories, and sleep. However not all trackers come with a heart rate monitor, so keep this in mind and be sure you know what you want. For running specifically it has an accelerometer to capture distance and pace, and for a little bit of encouragement take your smartphone with you for some audio prompting to keep up with pace, etc. The funky color display adds some style to the tracker, but to view your workouts more clearly just go to Garmin Connect online and link up your tracker- that way you can get a clearer picture of your training patterns. Top tip: if you are after your heart rate measurements you can also purchase the HR Monitor, compatible with your watch.