The Yo-Yo IE2 Test

Abstract

The Yo-Yo IE2 test was shown to possess high construct validity by showing large differences in performance, HR, and anaerobic metabolism between UTR and TR. In addition, V˙O2max seemed to be important for intermittent exercise performance in UTR but not for TR.

Acute ischemic preconditioning does not influence high-intensity intermittent exercise performance

“…In our study, blood lactate concentrations are in line with the literature for YoYoIE2 ( Krustrup et al, 2015 ) in similar subjects (i.e., untrained) confirming also the significant anaerobic contribution to ATP supply. Another study showed that IPC generated lower blood lactate concentration at submaximal intensity during an incremental running test ( Bailey et al, 2012 ), but in the current study we did not find any difference among IPC, SHAM and control conditions.…”

“…; trivial effect sizes) of acute IPC on this sort of test and population. The distance covered in the current study in the control conditions (935 ± 232 m) is higher than that reported for untrained men (665 ± 271 m) but lower than highly trained soccer players (2,027 ± 298 m) ( Krustrup et al, 2015 ). Since the scores of perception of recovery were similar before all of the three trials (i.e., players starting under same conditions), basic conditions for comparison of different protocols were ensured.…”

“…Although one study ( Gibson et al, 2015 ) evaluated the IPC effect in athletes with a history of participation in team sport and others in repeated sprint cycling ( Patterson et al, 2015 ), no study has examined its effects on high-intensity intermittent exercise (i.e., specific to team sports). The YoYo intermittent endurance test level 2 (YoYoIE2) simulates high-intensity intermittent exercise similar to the activity seen in soccer, and is effective due to its simplicity and reproducibility ( Bradley et al, 2011 ), and it is correlated with both oxygen uptake and citrate synthase activity in untrained men ( Krustrup et al, 2015 ). Although Krustrup et al (2015) stated that aerobic energy production plays a “more important role” for fatigue resistance in untrained subjects versus trained male soccer players during the YoYoIE2, their results showed also an important contribution of the glycolytic pathway in the YoYoIE2 (e.g., blood lactate ∼11 mmol at 5-min of recovery).…”

“…The YoYo intermittent endurance test level 2 (YoYoIE2) simulates high-intensity intermittent exercise similar to the activity seen in soccer, and is effective due to its simplicity and reproducibility ( Bradley et al, 2011 ), and it is correlated with both oxygen uptake and citrate synthase activity in untrained men ( Krustrup et al, 2015 ). Although Krustrup et al (2015) stated that aerobic energy production plays a “more important role” for fatigue resistance in untrained subjects versus trained male soccer players during the YoYoIE2, their results showed also an important contribution of the glycolytic pathway in the YoYoIE2 (e.g., blood lactate ∼11 mmol at 5-min of recovery). Since IPC seems to improve performance in exercise tests of predominantly lactic anaerobic and aerobic capacity ( Incognito, Burr & Millar, 2016 ), the aim of this study was to evaluate the acute effect of IPC on YoYoIE2 performance and some physiological parameters in amateur soccer players.…”

The Yo-Yo Intermittent Tests: A Systematic Review and Structured Compendium of Test Results

“…Computation of YYIE2 test global means, SDs and quantiles (Figure 4) included 48 studies/subgroups and 1,466 participants (median age = 23.0 years, IQR = 18.3–26.0 years) (Aziz et al, 2005; Rampinini et al, 2007; Bangsbo et al, 2010; Brito et al, 2010; Krustrup et al, 2010a,b,c, 2015; Randers et al, 2010, 2013; Ascensão et al, 2011; Bradley et al, 2011, 2013, 2014; Rebelo et al, 2011, 2013; Silva et al, 2011, 2013; Gibson et al, 2013; Dixon, 2014; Massuça et al, 2014; Massuca et al, 2015; Matta et al, 2014; Póvoas et al, 2014; Kvorning et al, 2017). …”