Actigraphy represents the movement recorded by the ReadiWatch and helps identify periods of sleep and wakefulness. If the readings are unusually high or low, the system may detect sleep incorrectly or fail to record it.
One of these patterns is known as fragmented actigraphy. On the graph, it appears as continuous blocks of very high or very low activity that remain at the same value for a specific period.
Identify the Issue
Review the actigraphy for the affected period. Signs of a possible issue include:
High activity while the user was still or asleep.
Very low or no activity while the user was moving.
Missing or incorrectly recorded sleep periods.
Example 1:
Example 2:
Recalibrate the ReadiWatch
If the actigraphy does not match the user’s activity, recalibrate the device by following the instructions in the following articles:
After completing the calibration:
Wear the watch during the next sleep period.
Sync the device.
Review the actigraphy and sleep data again.
Important: ReadiWatch devices with serial numbers beginning with RB6AAB—and some earlier batches—are older models for which this issue cannot be corrected through calibration and must therefore be replaced.
On newer models with serial numbers beginning with RB6AAC, RB6AAD, RB6AAE, or later letters, fragmented actigraphy may be corrected by performing a factory reset and recalibration.
If the issue continues, contact Support and include the affected period, the checks performed, and any relevant evidence.