Data Recording Settings
Select Menu > Settings > System > Data Recording.
Recording Interval: Controls how the device records activity data. The Smart option records key points where you change direction, speed, or heart rate. The 1 Sec option records points every second. It creates a very detailed record of your activity and increases the size of the stored activity file.
Cadence Averaging: Controls whether the device includes zero values for cadence data that occur when you are not pedaling (Data Averaging for Cadence or Power).
Power Averaging: Controls whether the device includes zero values for power data that occur when you are not pedaling (Data Averaging for Cadence or Power).
Log HRV: Sets the device to record your heart rate variability during an activity.