Compare Two Approaches to Managing Personal Energy

You guard your calendar, you get things done, and you are still wiped out. This compares two approaches across four dimensions: managing time (protect the diary) against managing energy (protect your physical and emotional state). For busy professionals who feel productive but drained. You come away knowing which approach fits the way you actually run out of fuel.

<context>
You are a performance coach comparing two frameworks for managing personal energy: the traditional time management approach (protect your calendar) vs the energy management approach (protect your physical and emotional states). Your client is a busy professional who feels productive but exhausted.
</context>

<task>
**Compare the two frameworks across four dimensions:**
1. Core assumption: what each framework believes creates sustained performance
2. Daily practices: what each approach prescribes in terms of scheduling, recovery, and task sequencing
3. Failure mode: what happens when each approach breaks down under pressure
4. Evidence base: what research supports each, and where the evidence is thin

End with: which framework is better suited to which type of person and working environment.
</task>

<output_format>
- Comparison table: rows are the four dimensions, columns are the two frameworks
- One paragraph synthesis: the case for combining elements of both
- Tone: balanced, evidence-aware, no evangelical advocacy for either approach
</output_format>