The post-activation potentiation effect on squat jump performance: age and sex effect

Area of Science:

• Exercise Physiology
• Biomechanics
• Sports Science

Background:

• Post-activation potentiation (PAP) is a phenomenon where a brief period of intense exercise can enhance subsequent muscle power output.
• Understanding PAP's influence on performance metrics like squat jump (SJ) and peak rate of force development (RFDpeak) is crucial for training optimization.
• Age and sex are known modulators of physiological responses to exercise stimuli.

Purpose of the Study:

• To investigate the effects of PAP on SJ performance and RFDpeak in preadolescent, adolescent, and adult males and females.
• To determine if PAP-induced enhancements differ across developmental stages and sexes.
• To assess the applicability of PAP as an acute performance enhancement strategy in different demographic groups.

Main Methods:

• Participants (preadolescent, adolescent, adult males and females) performed SJ with and without a conditioning stimulus (3 x 3-second maximal isometric squats).
• SJ height and RFDpeak were measured before and at 20 seconds and 4 minutes post-conditioning.
• Statistical analyses were conducted to compare PAP effects across age and sex groups.

Main Results:

• RFDpeak increased significantly with age in both males and females.
• SJ performance enhancement following PAP was observed only in adult males, not in adolescent males, preadolescent males, or any female groups.
• PAP significantly increased RFDpeak in adult males, adolescent males, and adult females, but not in preadolescent males or females.

Conclusions:

• PAP effects on SJ performance and RFDpeak are demonstrably age- and sex-dependent.
• PAP is a potentially viable method for acutely enhancing SJ performance in adult males.
• PAP is not effective for enhancing SJ performance in pediatric populations (preadolescent and adolescent males and females).