An average is a useful starting point, but it can hide how different the nights were. Strata's sleep history lets you move from a weekly picture to the records for an individual night. Begin with duration and coverage, then add any context you actually recorded.
Count the nights before reading the average
Check the date range and how many nights have records. A week with a missing night should not be described as seven measured nights. If a device was not worn or syncing stopped, the absence of a record is not evidence of no sleep.
Review sync status on iPhone if a night you expected is absent. Apple Health app access and contributing sources affect what information is available to connected apps.
Reference: Apple: Manage Health data
Look at the shape of the week
Inspect each nightly duration. Two weeks can have similar averages but different spreads: one may be consistent while another alternates between shorter and longer nights. Describe the observed pattern without deciding from the chart alone why it happened.
Use one period at a time. If you compare weeks, keep the boundaries and number of observations visible. A change in coverage can alter the summary even when the underlying routine is similar.
Open an individual night
The sleep detail view gives more information when it is available from your records. Review the night behind an unusual total, and check whether its date and recorded intervals match what you expected.
Stage information depends on the device and source. A chart's precision should not be mistaken for a clinical sleep assessment. This guide is about reviewing stored observations, not diagnosing a sleep condition.
Add context without forcing a cause
A late event, travel, or a note about your evening may help you remember a night. Keep that context separate from a claim that it explains the result.
If you want to explore an association with activity or wellbeing, use matching dates and consult the underlying records. The next useful action may simply be collecting a more consistent history.
An illustrative example
An average with visible variation
Alex's fictional seven-night durations are 7.2, 7.8, 6.5, 8.0, 7.5, 8.4, and 8.5 hours: an average of 7 hours 42 minutes. Wednesday is shorter than the other example nights, even though the weekly average alone does not show that.
Keep this in mind
A sleep review needs the nightly values, the date range, and the coverage behind the average.