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.
2025
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]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11388/356689
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