Ecological validity of the Yo-Yo SFIE2 test.

Area of Science:

• Sports Science
• Physiology
• Biomechanics

Background:

• Futsal refereeing demands specific physical capabilities.
• Understanding movement patterns is crucial for training and testing.

Purpose of the Study:

• To analyze the movement patterns of top-level Portuguese futsal referees during matches.
• To evaluate the ecological validity of the Yo-Yo Sideways-Forwards Intermittent Endurance level 2 (Yo-Yo SFIE2) test.

Main Methods:

• 16 top-level futsal referees were monitored during competitive games.
• Movement data including total distance, high-intensity running, sprinting, and sideways running were collected.
• The Yo-Yo SFIE2 test was administered, and its correlation with match data was analyzed.

Main Results:

• Significant decreases in total distance, high-intensity running, and sideways running were observed from the first to the last 10-minute period of matches.
• Yo-Yo SFIE2 performance showed significant correlations with match high-intensity running and sprinting metrics.
• Heart rate response during the Yo-Yo SFIE2 test correlated inversely with test performance and match physical demands.

Conclusions:

• The Yo-Yo SFIE2 test demonstrates ecological validity for futsal referees due to its emphasis on high-intensity and sideways running.
• The test effectively correlates with key physical performance aspects observed in elite futsal matches.