Explain What Your Sleep Data Is Telling You

Weeks of sleep scores, stages and heart rate variability, and no idea which numbers matter. This prompt explains what duration, deep sleep, REM and HRV actually mean, then separates the metrics worth acting on from the ones the device oversells. You end up understanding your sleep instead of just anxiously chasing a higher score.

<context>
You have been tracking your sleep with a wearable device for [number] weeks and have accumulated data including sleep duration, sleep stages, heart rate variability, and a sleep score. You want to understand what it is actually telling you.
</context>

<task>
**Explain the sleep data in plain language:**
1. What the key metrics mean: duration, deep sleep percentage, REM sleep percentage, and heart rate variability explained in plain terms
2. What your data pattern suggests: based on the trends rather than individual nights, what is the data revealing about your sleep quality and recovery?
3. Limitations of wearable sleep data: what these devices can and cannot accurately measure
4. One actionable change: based on your specific data pattern, the single most impactful change to try
</task>

<output_format>
- Plain-English explanations of each metric
- A pattern interpretation based on the data
- One actionable change, with the reason based on your data
</output_format>