title: Direct validity of the yo-yo intermittent recovery test in young team handball players.
abstract: The aim of this study was to examine the possible association between Yo-Yo intermittent recovery test level 1 performance (distance covered, Yo-Yo IR1) and match activities (direct validity) in young male team handball players. Eighteen young male players (age 14.3 +/- 0.5 years, body mass 64 +/- 28.7 kg, height 174 +/- 6 cm, body fat 11.2 +/- 3.9%) took part in this study. Players' match activities were videotaped during an experimental tournament (6 games/player) and analyzed using a computerized system. Games and Yo-Yo IR1 heart rates (HRs) (short-range telemetry, HR) and blood lactate concentrations ([la]b) were assessed throughout and at selected times of the games, respectively. Peak Yo-Yo IR1 HR was assumed as representative of individual maximal HR (HRmax). Mean and peak game HRs were 174 +/- 3 and 198 +/- 2 b.min, which corresponded to 87 and 99% of HRmax, respectively. Yo-Yo IR1 performance (1,831 +/- 373 m) was significantly related (r = 0.88, p < 0.01) to total game distance (1,921 +/- 325 m). Post-game (9.2 +/- 2.3 mmol.L) and Yo-Yo IR1 (8.8 +/- 1.6 mmol.L) [la]b were significantly related (r = 0.51, p < 0.05). These findings demonstrated the direct validity of Yo-Yo IR1. Consequently, Yo-Yo IR1 test may be considered as a team handball test relevant for the assessment of intermittent high-intensity endurance in young male team handball players.
authors.affiliation: Higher Institute for Sport and Physical Education of Ksar-Said, Unit of Research, Movement Analysis and Performance Assessment, Ksar-Said, Tunisia.
authors.forename: Hermassi
authors.initials: H
authors.lastname: Souhail
authors.forename: Carlo
authors.initials: C
authors.lastname: Castagna
authors.forename: Haj Yahmed
authors.initials: HY
authors.lastname: Mohamed
authors.forename: Hachana
authors.initials: H
authors.lastname: Younes
authors.forename: Karim
authors.initials: K
authors.lastname: Chamari
mesh_terms: D000293:Adolescent; D054874:Athletic Performance / Q000502:physiology; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D007773:Lactates / Q000097:blood; D016014:Linear Models; D008297:Male; D010807:Physical Endurance / Q000502:physiology*; D010809:Physical Fitness / Q000502:physiology; D020127:Recovery of Function; D013177:Sports / Q000502:physiology*; D014743:Videotape Recording
chemical_list: D007773:Lactates