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Accelerometry-Based External Load Indicators in Sport: Too Many Options, Same Practical Outcome?

Carlos D Gómez-Carmona1, José Pino-Ortega2, Braulio Sánchez-Ureña3

  • 1Optimization of Training and Sport Performance Research Group (GOERD). Sport Science Faculty. University of Extremadura, 10005 Caceres, Spain.

International Journal of Environmental Research and Public Health
|December 19, 2019
PubMed
Summary
This summary is machine-generated.

Different accelerometry-based external load indicators (ABELIs) show high correlations but vary significantly in absolute values. Standardization is needed for consistent sports science research comparing external load.

Keywords:
accelerometersload indexesmonitoringsport technologyteam sports

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Area of Science:

  • Sports Science
  • Biomechanics
  • Exercise Physiology

Background:

  • Microsensor technology has led to various accelerometry-based external load indicators (ABELIs) in sports.
  • Understanding the agreement between these ABELIs is crucial for accurate load assessment.

Purpose of the Study:

  • To analyze the agreement between different accelerometry-based external load indicators (ABELIs) used in sports science.
  • To compare the outputs of various ABELIs during official soccer matches.

Main Methods:

  • Collected 3-D accelerometry data from U-16 male soccer players across three official matches.
  • Calculated and compared six ABELIs (AcelT, Player LoadRT, PlayerLoadTM, Impulse Load, Player LoadRE, Total Load) using absolute and normalized (Z-scores) data.

Main Results:

  • High correlations (r > 0.803) were observed between ABELIs in both absolute and normalized data.
  • Significant differences in absolute values were found between ABELIs (bias = -579,226.6 to 285,931.1).
  • No significant differences were found when using scaled and centered (Z-scores) data (bias = 0).

Conclusions:

  • While ABELIs correlate highly, their differing magnitudes and units hinder direct comparison.
  • A standardized universal index for accelerometer load calculation is necessary for reliable between-study comparisons in sports science.