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Area of Science:

  • Sports Science
  • Exercise Physiology
  • Biomechanics

Background:

  • Postactivation performance enhancement (PAPE) describes acute performance improvements following a conditioning activity (CA).
  • The specificity of PAPE, particularly whether it extends beyond the directly trained musculature, remains an area of investigation.
  • Understanding PAPE's localized versus nonlocalized effects is crucial for optimizing training protocols.

Purpose of the Study:

  • To investigate if a leg-dominant CA (barbell back squat) induces PAPE in non-leg muscles.
  • To examine the effects of a leg CA on localized (leg extensors) and nonlocalized (elbow flexors, upper body dynamic power) performance.
  • To differentiate between localized PAPE and nonlocalized performance changes after a conditioning activity.

Main Methods:

  • Twelve male basketball players performed a CA consisting of 3 sets of 3-4 repetitions of barbell back squats at 60-90% of 1RM.
  • Performance was assessed pre- and post-CA using localized tests (isokinetic knee flexion/extension, countermovement jumps) and nonlocalized tests (isokinetic elbow flexion, explosive push-ups).
  • Localized and nonlocalized testing protocols were conducted on separate days in a randomized order.

Main Results:

  • The barbell back squat CA significantly enhanced peak torque and average power in localized isokinetic knee tests (concentric and eccentric actions).
  • A significant decrease in peak torque and average power was observed in nonlocalized eccentric elbow flexion tests.
  • No significant differences were found in countermovement jump or explosive push-up performance between pre- and post-conditioning measures.

Conclusions:

  • Postactivation performance enhancement following a leg conditioning activity appears to be specific to the musculature directly involved in the exercise.
  • The conditioning activity demonstrated an inhibitory effect on the eccentric contractions of non-involved muscles.
  • These findings suggest that while PAPE can enhance performance in trained muscles, it may concurrently impair performance in untrained muscle groups.