Background: To gain optimal positioning to make sure the game laws are applied in uniform way, the performance of field referee must be periodically evaluated to have constantly adequate training during a match and during the competitive season. Considering that field Yo-Yo Intermittent Recovery Test-Level 1 is frequently employed in elite team sport players to estimate maximal oxygen uptake (VO2max) in field settings, the aim of this cross-sectional, gender-comparative study was to develop a new adjusted Yo-Yo-1 equation for estimating VO2max in football referees. Methods: During off-season, 20 male (21.2±3.6 yrs) and 20 female (22.5±4.6 yrs) sub-elite football referees underwent laboratory treadmill test and Yo-Yo-1. Results: VO2max during Yo-Yo-1 and laboratory treadmill test were significantly correlated in the whole sample (r=0.871; P<0.0001), women (r=0.861; P<0.0001) and men (r=0.800; P<0.0001). Only in women VO2max during Yo-Yo-1 was lower than laboratory treadmill test (-4.3%; P=0.014). Adjusted formulae (pooled and gender-based) allowed to mitigate the underestimated values of laboratory treadmill test of VO2max found with the Bangsbo's equation (pooled sample: -14.9%, P<0.0001; women: -13.2%, P<0.0001; men: -16.4%, P<0.0001). Conclusions: Adjusted Yo-Yo-1 equations allow to accurately monitor changes in cardiopulmonary performance, and based on this, administer constantly adequate training loads, in male and female field referees.
Adjusting the Yo-Yo IRT-1 equation to estimate VO2max of sub-elite football referees: a gender-comparative study / Ventura, Lucia; Martinez, Gianluca; Morrone, Marco; Boi, Anna; Meloni, Martina; Perroni, Fabrizio; Donadu, Matthew G.; Deriu, Franca; Manca, Andrea. - In: THE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS. - ISSN 1827-1928. - Jan 16(2025). [10.23736/s0022-4707.24.16556-5]
Adjusting the Yo-Yo IRT-1 equation to estimate VO2max of sub-elite football referees: a gender-comparative study
VENTURA, Lucia;MARTINEZ, Gianluca;MORRONE, Marco;BOI, Anna;MELONI, Martina;DONADU, Matthew G.;DERIU, Franca
;MANCA, Andrea
2025-01-01
Abstract
Background: To gain optimal positioning to make sure the game laws are applied in uniform way, the performance of field referee must be periodically evaluated to have constantly adequate training during a match and during the competitive season. Considering that field Yo-Yo Intermittent Recovery Test-Level 1 is frequently employed in elite team sport players to estimate maximal oxygen uptake (VO2max) in field settings, the aim of this cross-sectional, gender-comparative study was to develop a new adjusted Yo-Yo-1 equation for estimating VO2max in football referees. Methods: During off-season, 20 male (21.2±3.6 yrs) and 20 female (22.5±4.6 yrs) sub-elite football referees underwent laboratory treadmill test and Yo-Yo-1. Results: VO2max during Yo-Yo-1 and laboratory treadmill test were significantly correlated in the whole sample (r=0.871; P<0.0001), women (r=0.861; P<0.0001) and men (r=0.800; P<0.0001). Only in women VO2max during Yo-Yo-1 was lower than laboratory treadmill test (-4.3%; P=0.014). Adjusted formulae (pooled and gender-based) allowed to mitigate the underestimated values of laboratory treadmill test of VO2max found with the Bangsbo's equation (pooled sample: -14.9%, P<0.0001; women: -13.2%, P<0.0001; men: -16.4%, P<0.0001). Conclusions: Adjusted Yo-Yo-1 equations allow to accurately monitor changes in cardiopulmonary performance, and based on this, administer constantly adequate training loads, in male and female field referees.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.