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Yo-Yo Test

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Efficacy of fitness testing protocols in predicting competitive football match performance
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In this study, we will consider Total Distance Covered (TDC) in a Yo-Yo Intermittent Recovery Test, Level 1 (YYIRTL1) and match performance for outfield players (defenders, midfielders, attackers) in male soccer. C1 Goalkeepers have shown a different set of physical characteristics compared to outfield players (heavier, taller and a lower peak O2 uptake). C1 Outfield players show only minor differences in peak O2 uptake C1 and HR values C4 during soccer game performance. We will assess twenty England based elite soccer players (body mass; 75 +/- 5kg, height; 180 +/- 5cm, and age; 25 +/- 5 years) from the championship division of English soccer …show more content…

During international championship games, players will wear a GPS device (GPS, SPElite, GPsports, Australia) C3 slotted into a small backpack enabling distance recording (1 Hz) C3. Players will complete the YYIRTL1 on a separate occasion. Physical demands (distance coverage) will be recorded during the match (two 45-minutes halves) and YYIRTL1.

Yo-Yo Test

The Yo-Yo (YYIRT) tests feature 2 levels, L1 starts at 10 km/hr and L2 starts at 13 km/hr (BANGSBO, J. Fitness Training in Football—A Scientific Approach). It has been suggested to use L2 in well-trained players in an attempt to shorten assessment-session time (BANGSBO, J. Yo-Yo Test. Ancona, Italy: Kells, 1996) however; we are testing elite and amateur players, and will therefore use an YYIRTL1 for all.

Players will be familiar with the fitness testing protocol having done similar assessments as part of their regular programs. The YYIRTL1 consists of 20-m shuttle runs performed at increasing velocities, with 10 seconds of active recovery between runs, players continue until exhaustion. A CD will give audio cues (www.teknosport.com, Ancona, Italy) and played using a portable CD player (Az1030 CD player; Phillips, Best, The

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