Yo-Yo intermittent recovery level 1 test data for athletes
Various studies have examined the performance of athletes on the Yo-Yo intermittent recovery level 1 (IR1) tests. The most recent results are presented here. It was clear that male top-class soccer players, playing matches at the highest international level, had a higher performance level on the Yo-Yo IR1 test (2420 m) than elite (2190 m) and sub-elite players (2030 m) as well as moderate trained soccer players (1810 m; see Figure 1A).

Similarly data were obtained for female soccer players with the performance level of top-class, elite and sub-elite players being 1600, 1360, and 1160 m, respectively (see Figure 2B). The latter group had the same level as female young elite-badminton players (age 21 years: 1200 m; and age 17 years: 1080 m; observations not previously published) and considerable better performance than U21 state-level female hockey players (840 m).

The same pattern as for soccer players was observed for male soccer referees (see Figure A).

Performance of elite rugby players (1656 m) was less than observed for elite-soccer players and the level of the elite rugby players was almost the same as for sub-elite players (1564 m).

Some data also exists for cricket and for recreational individuals and they clearly have lower values than those observed for soccer and rugby (see Figure A).

Yo-Yo IR1 scores for athletes
Yo-Yo IR1 test performance for male (A) and female (B) athletes in relation to their competitive level and to the type of sport practiced. Values are mean ± SEM.