Definition

Central Nervous System—controls muscle activation and recovery; its fatigue limits performance independent of muscle fatigue. It's your body's operating system.

Example Usage

Heavy singles deplete CNS reserves rapidly; include adequate recovery days to allow CNS supercompensation.

Origin

Neuroscience and sports science terminology

Fun Fact

CNS fatigue can persist for 48-72 hours despite muscle recovery being complete, which is why deloads are critical for heavy lifters.

Source: Neuroscience and strength training

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