Predicting repeat power ability through common field assessments: is repeat power ability a unique physical quality?

Area of Science:

• Sports Science
• Exercise Physiology
• Biomechanics

Background:

• Repeat Power Ability (RPA) assesses the capacity for repeated maximal ballistic efforts with external loads.
• The specific physical qualities underpinning RPA remain largely undetermined.
• Understanding these qualities is crucial for optimizing athletic performance and training.

Purpose of the Study:

• To investigate the physical qualities that determine Repeat Power Ability (RPA).
• To analyze the association between various physical assessments and RPA.
• To identify the best predictors of RPA in trained athletes.

Main Methods:

• Ten male field hockey players completed an RPA assessment (20 loaded countermovement jumps).
• Participants underwent YoYo Intermittent Recovery Test 2, repeated speed ability with 180° changes of direction (RSA₁₈₀), 40m speed test, isometric mid-thigh pull, countermovement jump, and 3-repetition max half squat.
• Pearson's correlation and stepwise multiple linear regression analyses were employed.

Main Results:

• Repeated speed ability with 180° changes of direction (RSA₁₈₀) showed a very strong, significant positive correlation with RPA (r=0.736, p<0.05).
• Relative strength from the half squat (HSrel) demonstrated a very strong, significant negative correlation with RPA (r=-0.728, p<0.05).
• RSA₁₈₀ explained 48.4% of the variance in RPA, identified as the sole significant predictor.

Conclusions:

• Repeated speed ability (RSA₁₈₀) is a strong determinant and the best predictor of Repeat Power Ability (RPA).
• RPA may serve as an indicator of an athlete's capacity for repeated high-intensity efforts.
• RPA appears to be a distinct physical quality, warranting further research into contributing factors.