Post-activation potentiation (PAP) in sprint training, and when is it beneficial?

• A. A permanent increase in muscle contractility.
• B. A temporary decrease in neural drive after heavy loading.
• C. A transient increase in muscle contractility following heavy loading; beneficial as a priming stimulus before max-speed efforts when properly dosed and individual-tuned.
• D. No effect on sprint performance.

Answer: (C)

Post-activation potentiation is a temporary boost in muscle contractile performance that follows a heavy conditioning activity. It is not permanent and fades as fatigue and recovery dynamics unfold. When the conditioning stimulus is dosed well and tailored to the athlete, PAP can act as a priming signal before maximum-speed efforts, helping you generate greater peak force and faster sprint velocity in the subsequent sprint. The key is getting the balance right: a load heavy enough to recruit fast-twitch motor units and increase cross-bridge sensitivity, but not so fatiguing that performance suffers. If the stimulus is misjudged, fatigue can outweigh any potentiation, yielding little or no benefit.