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

Research Article

Volume 3 Issue 3

Relationships Between The Yo-Yo Intermittent Recovery Test Level 2 And Match-Running Performance Vary Between Playing Positions In Elite Under-14 Soccer Players

Heita Goto* and Chris Saward

February 22, 2024

DOI : 10.56831/PSSRP-03-090

Abstract

The aim of the present study was to examine the relationships between the Yo-Yo intermittent recovery test level 2 (YYIR2) and match-running performance across playing position in elite young soccer players. Participants were 142 players from 14 professional soccer academy under-14 teams. Twenty-six 11-a-side matches were analyzed using a Global Positioning System. Total distance, distance covered by sprinting (> 5.3 m∙s-1), distance covered at very high-intensity activity (VHIA, ≥ 4.5 m∙s-1), distance covered above maximal power (MaxP, > 55 W·kg-1) and metabolic power greater than or equal to 35 W·kg-1 (MP≥35), and acceleration (> 2 m∙s-2, NA>2) and deceleration (< 2 m∙s-2, ND<2) frequencies were computed. The YYIR2 test was conducted within three weeks of the matches. When all players were included, the YYIR2 distance was positively related to all match-running performance variables (r = 0.31-0.49, all P < 0.01). When the analysis was conducted on individual playing positions, the YYIR2 distance demonstrated: positive relationships with total distance in defenders and central midfielders (r = 0.42-0.63, all P < 0.05); positive relationships with sprinting, VHIA, MaxP and MP≥35 distance and NA>2 in all playing positions (r = 0.41-0.71, all P < 0.05); and positive relationships with ND<2 in central midfielders (r = 0.55, P = 0.005). The present results indicate that the YYIR2 is a valid test for the assessment of match-related physical fitness in elite young soccer players across playing position. However, the relationships between the YYIR2 and match-running performance variables are playing position-dependent except for match-running distance at high-speeds and high-metabolic powers and NA>2.

Keywords: Association football; endurance fitness; field test; match analysis; and young players

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