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Integrating video tracking and GPS to quantify accelerations and decelerations in elite soccer
Eduard Pons1, Tomás García-Calvo2, Francesc Cos3,4
1Sports Performance Area, FC Barcelona, Barcelona, Spain.
Scientific Reports
|September 18, 2021
Summary
Both video tracking (MEDIACOACH) and GPS (WIMU PRO) systems show acceptable agreement for analyzing soccer players' acceleration demands. While differences exist, both devices are useful for assessing player performance during competition.
Area of Science:
- Sports Science
- Biomechanics
- Performance Analysis
Background:
- Accurate measurement of player movement demands is crucial for optimizing training and performance in professional soccer.
- Video tracking systems and wearable GPS devices are commonly used to collect this data during competition.
- Understanding the agreement between these technologies is essential for reliable data interpretation.
Purpose of the Study:
- To compare the agreement between a video tracking system (MEDIACOACH) and a GPS device (WIMU PRO) in quantifying acceleration and deceleration demands during official soccer matches.
- To assess the reliability and validity of both systems for analyzing player physical exertion.
Main Methods:
- Data from a Spanish professional soccer club were collected over a competitive season.
- The number and distance covered during acceleration and deceleration phases were recorded by both MEDIACOACH and WIMU PRO systems.
- Statistical analyses included descriptive statistics, bias analysis, standardized mean bias, standardized typical error of the estimate (TEE), and Intra-class Correlation Coefficients (ICCs).
Main Results:
- WIMU PRO recorded a higher number of acceleration and deceleration bursts compared to MEDIACOACH, though covered distances were similar.
- Negative bias was observed for WIMU PRO compared to MEDIACOACH in the number and distance of accelerations/decelerations across various intensity thresholds (p < 0.05).
- Despite some bias, standardized mean differences were trivial to small, ICCs indicated good to excellent agreement (>0.90), and percentage changes were below acceptable thresholds (<14% for number, <7% for distance).
Conclusions:
- Both MEDIACOACH and WIMU PRO demonstrate an acceptable degree of agreement for analyzing player acceleration demands in professional soccer.
- These systems can be considered useful tools for performance analysis during official competitions.
- Caution is advised when interpreting results, and validation against a gold standard is recommended for definitive system confirmation.
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