Moreover, players’ high intensity movements are positively associated with their anaerobic energy pathways ( Castagna et al., 2006). The recovery capacity of players during repeated high-intensity bouts is closely related to the development of aerobic capacity ( Tomlin and Wenger, 2001 Castagna et al., 2008). A soccer game involves jumping, shooting, challenges, turns, dribbles, sprints, controlling the ball under pressure, running at different speeds, and sliding tackles both aerobic and anaerobic energetic pathways are used during games ( Açıkada et al., 1998 Stolen et al., 2005). The activities involved in soccer are of intermittent nature, with changes every 3–5 s, resulting in repeated high-intensity spells of play ( Krustrup et al., 2006 Little and Williams, 2007). Soccer performance is not only affected by technical skills, a player’s physical capacity is known to exert a major influence on his match performance ( Little and Williams, 2007). In conclusion, the YIRT2 may be a more suitable field test for determining both aerobic and anaerobic performance in soccer players. A moderate negative correlation was found between performance in the YIRT2 and Fatigue index (FI) (r = −0,66). There were also moderate significant negative correlations between performance in the YIRT2 and peak power measured in the WaNT (r = −0.55), although there were no significant correlations between performance in the three tests and average power.
While there were moderate correlations between VO 2max and YIRT 1–2 performances (respectively, r = 0.56, r = 0.53), there was only a weak relationship between VO 2max and YET performance (r = 0.43) (distance covered).
At the end of the study, significant differences were found between the Yo-Yo tests and TRT in terms of HRmax (TRT = 195,92, YIRT1 = 197,83, YIRT2 = 198,5 YET = 198) (p > 0.05). An ergospirometry device was used during the treadmill test (TRT) to determine VO 2max. The purposes of this study were to determine the relationship between performance in the Yo-Yo intermittent recovery test level 1 (YIRT1), the Yo-Yo intermittent recovery test level 2 (YIRT2) and the Yo-Yo endurance test (continuous) (YET) with maximal oxygen uptake (VO 2max) and Wingate anaerobic performance (WaNT) test results in young soccer players (age 15.00 ± 0.0 years, body height 176.3 ± 4.2 cm and body mass 68.1 ± 3.6 kg).
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