37% off Garmin Forerunner 225 GPS Running Watch with Wrist-based Heart Rate – Deal Alert

In addition to using GPS to calculate distance and pace, the 225 has a built-in accelerometer. This allows it to capture distance and pace data when you’re running on an indoor track or treadmill, with no need for a separate foot pod accessory.  Forerunner 225 is the first Garmin GPS running watch with wrist-based heart rate.