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The Multi-Component Structure of Core Strength.

Sarah Schulte1, Jessica Bopp1, Volker Zschorlich1,2

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Summary

Core strength is not a single ability but comprises three distinct components: maximal strength, endurance, and power. Differentiating these aspects is crucial for effective sports diagnostics and training programs.

Keywords:
core endurancecore powerdiagnosticsforce-differentiated approachmaximal core strengthprincipal component analysis

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Area of Science:

  • Sports Science
  • Biomechanics
  • Human Movement Analysis

Background:

  • Current core strength diagnostics often prioritize endurance over maximal strength or power.
  • The need to determine if core strength is a singular construct or requires differentiation into multiple components.

Purpose of the Study:

  • To investigate the dimensionality of core strength.
  • To determine if core strength can be measured by a single test or requires multiple assessments.

Main Methods:

  • Forty-two adult sports students underwent two randomized laboratory testing sessions.
  • Isometric measurements of peak rate of force development (pRFD), maximal voluntary contraction (MVC), and holding time were recorded during four core exercises.

Main Results:

  • Principal component analysis (PCA) identified three components from twelve core strength variables.
  • These components, explaining 73.3% of the variance, were labeled maximal core strength, core endurance, and core power.

Conclusions:

  • Core strength appears to be a multidimensional construct, necessitating differentiation into maximal strength, endurance, and power.
  • These findings are vital for sport science and practice, informing diagnostics, training, and injury prevention.