Application of four different football match analysis systems: a comparative study

Area of Science:

• Sports Science
• Biomechanics
• Performance Analysis

Background:

• Football performance analysis relies on accurate tracking of player activity and fatigue.
• Various technologies, including video analysis and GPS, are used to monitor these metrics.
• Understanding the comparability of these systems is crucial for reliable research and coaching.

Purpose of the Study:

• To compare the activity patterns and fatigue development in football players using four different tracking systems.
• To assess the ability of each system to detect performance decrements during a match.
• To identify potential discrepancies in distance measurements between systems.

Main Methods:

• Four systems were employed: a video-based time-motion analysis system, a semi-automatic multiple-camera system, and two GPS units (5 Hz and 1 Hz).
• Twenty professional football players participated in a match, with data collected on total distance, high-intensity running, and sprinting.
• Statistical analysis compared performance metrics across different 15-minute intervals and between systems.

Main Results:

• All systems detected significant reductions in total distance and high-intensity running in the final 15 minutes compared to earlier periods.
• High-intensity running decreased by 37-50% from the first to the last 15-minute interval across systems.
• Substantial differences were observed in the absolute distances recorded by each system.

Conclusions:

• The four analyzed systems can effectively detect game-induced fatigue and performance decrements in football.
• Researchers and practitioners should exercise caution when comparing absolute performance data across different tracking systems due to inter-system variability.