Neuromuscular Fatigue Calculator

How to calculate Neuromuscular Fatigue?

Neuromuscular fatigue (NMF) is a reduction in the ability of the nervous system to activate muscles effectively, often measured via explosive power tests.

Formula: Fatigue % = ((Post-Session - Pre-Session) / Pre-Session) × 100

Using the NMF calculator: a strength-training example

A powerlifter tests their baseline vertical jump before a heavy squat session.

Step-by-step calculation:

1. Baseline jump: 50.0 cm
2. Post-session jump: 44.5 cm
3. Difference: -5.5 cm
4. Fatigue: (-5.5 / 50) * 100 = -11% (Significant Fatigue)

Frequently Asked Questions

Why use jump height as a proxy?

Vertical jumps require high-frequency neural drive; a performance drop directly reflects systemic CNS fatigue.

How long does NMF recovery take?

Depending on intensity, CNS recovery can take 24 to 72 hours, often longer than local muscle soreness.

When should I test?

Perform the pre-test after a standard warm-up and the post-test immediately after your final training set.