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Using Tri-Axial Accelerometry in Daily Elite Swim Training Practice.

Sander Ganzevles1, Rik Vullings2, Peter Jan Beek3

  • 1Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, 1081 BT Amsterdam, The Netherlands. s.p.m.ganzevles@vu.nl.

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Summary

Tri-axial accelerometers reliably monitor elite swimmers' lap times, stroke counts, and stroke rates. This technology offers coaches more accurate data for training control than traditional stopwatches.

Keywords:
complianceelitemonitoringreliabilitytraining

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Area of Science:

  • Sports Science
  • Biomechanics
  • Swimming Performance Analysis

Background:

  • Elite swimming training relies on precise program design and athlete adherence.
  • Current monitoring methods using stopwatches are limited and prone to human error.
  • Tri-axial accelerometers offer a potential advancement in objective swimming performance measurement.

Purpose of the Study:

  • To evaluate the reliability and practical utility of tri-axial accelerometers for monitoring key swimming metrics.
  • To compare accelerometry-based data with traditional stopwatch measurements in elite swimmers.
  • To assess the effectiveness of accelerometers in monitoring training compliance.

Main Methods:

  • 13 elite swimmers performed a 1200m warm-up, with data collected via tri-axial accelerometers and synchronized video.
  • Reliability was assessed using typical error of measurement (TEM) and Bland-Altman analysis.
  • Four swimmers' training compliance was monitored in sessions with set lap time and stroke count targets.

Main Results:

  • High reliability was found for lap time (TEM=0.26s), stroke count (TEM=0.73 strokes), and stroke rate (TEM=0.72 str/min).
  • Bland-Altman analysis confirmed acceptable limits of agreement for all measured parameters.
  • Accelerometry demonstrated practical usefulness in monitoring daily training compliance.

Conclusions:

  • Tri-axial accelerometers provide accurate and reliable monitoring of elite swimmers' daily training.
  • This technology offers coaches superior data for guiding and controlling the training process compared to manual timing.
  • Accelerometers enhance objective feedback for optimizing swimming performance.