PriMera Scientific Surgical Research and Practice (ISSN: 2836-0028)

Research Article

Volume 1 Issue 3

Relationships Between the Yo-Yo Intermittent Recovery Test Level 2 And Match-Running Performance Differ Across Playing Position in Elite Youth Soccer Players

Heita Goto*, Scott A Willis and James A King

February 28, 2023

DOI : 10.56831/PSSRP-01-015


The aim of the present study was to examine the relationships between the Yo-Yo intermittent recovery test level 2 (YYIR2) performance and match-running performance across playing positions in elite youth soccer players. Participants were 129 players (age = 17.0 ± 0.8 years) from 11 professional soccer academy teams. A Global Positioning System was employed to analyze 26, 11-a-side matches for: total distance covered; distance covered high-intensity running (HIR, 3.6 to 4.4 m·s-1), very high-intensity running (VHIR, 4.5 to 5.3 m·s-1), sprinting (> 5.3 m·s-1) and very high-intensity activity (VHIA, calculated as VHIR plus sprinting); distance covered by high power (HP, 20-35 W·kg-1), elevated power (EP, 35-55 W·kg-1), maximal power (MaxP, > 55 W·kg-1) and MP≥35 (calculated as EP plus MaxP); and number of accelerations (> 2 m·s-2) and decelerations (< 2 m·s-2). The YYIR2 test was conducted within three weeks of the matches. When all players were included, the YYIR2 distance was positively associated with all match-running performance variables (r = 0.36-0.47, all P < 0.01). When each playing position was analyzed separately, the YYIR2 distance was significantly related to: total distance in central defenders (CD) (r = 0.47, P < 0.05); VHIA in all playing positions except CD (r = 0.49-0.69, all P < 0.05); MP≥35 distance in all playing positions (r = 0.52-0.82, all P < 0.05); and number of accelerations and decelerations in defenders (r = 0.53-0.83, all P < 0.05). These findings suggest that the YYIR2 is a valid test for the assessment of match-related physical fitness in elite youth soccer players regardless of playing position. However, the relationships between the YYIR2 and match running performance variables are playing position-dependent except for when the metabolic power approach (MP≥35) is employed.
Keywords: Association football; endurance fitness; field test; match analysis; young players


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