Multivariate analysis of between- and within-athlete technical variability during pole vault

Area of Science:

• Biomechanics
• Sports Science
• Movement Analysis

Background:

• Limited research exists on the interplay between centre of mass (COM) movement and pole bend mechanics during the pole-support phase of pole vaulting.
• Understanding these functional time series is crucial for optimizing athletic performance and injury prevention.

Purpose of the Study:

• To investigate the complex relationship between COM kinematics and pole bend dynamics during the pole-support phase.
• To identify distinct movement strategies employed by pole vaulters using advanced statistical analysis.

Main Methods:

• Utilized markerless motion capture to collect joint centre trajectories from 11 pole vaulters across 64 trials.
• Derived centre of mass (COM) position and pole cord length data from pole plant to top-hand release.
• Applied multilevel, multivariate, functional principal component analysis (MMFPCA) to analyze movement patterns.

Main Results:

• Identified two between-participant modes of variation related to COM motion and pole bend timing.
• Discovered four within-participant modes, highlighting variations in pole bend during the critical final phase of support.
• Demonstrated that athletes employ multiple strategies to regulate pole energy storage and release.

Conclusions:

• Athletes exhibit technical variability within constrained performance outcomes in pole vaulting.
• MMFPCA is a powerful tool for comprehensively describing coordinated movement in complex tasks.
• This methodology offers potential for future analysis of athletic performance and technique optimization.