CNS fatigue

Definition

Central Nervous System exhaustion from prolonged high-intensity training, distinct from muscular fatigue. When your brain taps out before your muscles, explaining why you feel like a zombie after heavy squats.

Example Usage

I've been hitting too many heavy singles - definitely dealing with CNS fatigue now.

Origin

Exercise physiology concept that gained popularity in strength training communities in the 2000s-2010s.

Fun Fact

CNS fatigue is controversial in exercise science - some researchers argue it's more about motivation and perception than actual nervous system depletion.

Source: Exercise physiology and strength training terminology

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