Hi all, I'm currently analyzing sleep data from the Fitbit API and noticed two different sleep level designs recorded on the same day. One format includes asleep, awake, and restless, while the other uses light, deep, REM, and wake. After consulting the Fitbit API documentation, I found the following definitions: Classic: Short for "Classic Sleep." This sleep data is recorded with a 60-second granularity. "Sleep Pattern" levels include asleep, restless, and awake. Stages: Short for "Sleep Stages." This sleep data is recorded with a 30-second granularity. "Sleep Stages" levels include deep, light, REM (rapid eye movement), and wake. However, I'm still unclear about the practical differences between these two models. Could anyone help clarify this? Thank you! Best Yuhang
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