What is emotional exhaustion vs physical fatigue?

Example: You slept eight hours, ate well, and exercised this morning — physically, you're optimal. But you just left a meeting where your idea was dismissed without discussion, and now you can't focus on the strategic document in front of you. Your physical fuel tank is full. Your emotional tank is empty. No amount of coffee or standing-desk adjustment will fix what is fundamentally an emotional depletion problem requiring an emotional recovery intervention.

This concept is part of Energy Management in the How to Think curriculum, which builds the epistemic infrastructure for energy management.