Definitionv1
Energy journal: an ongoing measurement system that tracks
Energy journal: an ongoing measurement system that tracks energy levels throughout the day to identify personal patterns across multiple timescales (ultradian, circadian, weekly, monthly, seasonal, life-phase) that reveal conditional patterns, slow drifts, recovery dynamics, and exception events invisible in single-week audits
Why This Is a Definition
This definition precisely establishes 'energy journal' by naming it, categorizing it as an ongoing measurement system, and specifying its genus (tracking energy levels throughout day). The differentia includes its function (identifying patterns across multiple timescales) and what it reveals (conditional patterns, slow drifts, etc.) that single-week audits cannot detect. It distinguishes the journal from simple data collection by emphasizing its longitudinal value and pattern detection capabilities.