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A novel measure to quantify technical ability in on-water rowing.

Sam Jones1, Chris Bailey2, Dave Thomas2

  • 1Applied Sports Technology, Exercise Medicine Research Centre (A-STEM), Swansea University, Swansea, UK.

Journal of Sports Sciences
|April 30, 2025
PubMed
Summary

A new rowing performance measure, "on-water delta," quantifies technical ability by comparing predicted and actual on-water speeds. This metric accounts for physiological and environmental factors in elite rowers.

Keywords:
Athletesergometrylinear mixed modelstatisticstechniquewater sports

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Area of Science:

  • Sports Science
  • Biomechanics
  • Performance Analysis

Background:

  • Assessing technical ability in rowing is complex, influenced by physiological and environmental variables.
  • Existing performance metrics often fail to isolate the impact of technique from external factors.

Purpose of the Study:

  • To develop and validate a novel measure, "on-water delta," for quantifying technical proficiency in on-water rowing.
  • To establish a method for differentiating technical performance from physiological capacity and environmental conditions.

Main Methods:

  • Collected maximal 2000m ergometer and on-water rowing data from 162 elite athletes over 16 years.
  • Utilized a linear mixed model to predict on-water performance based on ergometer data, incorporating environmental factors.
  • Calculated "on-water delta" as the discrepancy between predicted and actual on-water performance.

Main Results:

  • The linear mixed model demonstrated significant predictive power for ergometer performance on on-water results.
  • Random effects for year indicated variability in environmental influences, ranging from -15.43s to 47.98s.
  • "On-water delta" values varied widely, from -32.8s (faster than predicted) to 51.1s (slower).

Conclusions:

  • "On-water delta" serves as a robust, novel dependent variable for assessing rowing technical ability.
  • The developed modeling approach provides a framework for population-specific quantification of technical skill in rowing.
  • This study offers valuable contextual data on "on-water delta" from a large cohort of high-level rowers.