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Post-activation potentiation

Post-activation potentiation (PAP) - A phenomenon in which a muscle’s force is acutely increased as a result of its contractile history (1). Example, an individual may attempt to improve vertical jump height (box jumps) by first performing a set of low volume, heavy back squats.  Further research is needed to optimize inter-set rest periods, total reps, load and volume.
  1. Robbins, D. W. (2005). Postactivation potentiation and its practical applicability: a brief review. Journal of Strength and Conditioning Research, 19(2), 453.