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Critical Power may refer to:
The minimum power level at which a nonlinear system undergoes a qualitative change (commonly discussed in optics, superconductors, and other fields).
A threshold power or power density associated with onset of a critical behavior in electrochemical systems (e.g., during electrocatalysis or electrolysis).
In sports science, a threshold power metric related to sustainable power output used in cycling and endurance training (e.g., CP/critical power model).