Conceptually valid physical capacity tests such as yo-yo IR2 should be linked to performance [1]. The aim of this study was to verify if yo-yo intermittent recovery test (level 2) (yo-yo IR2) score is linked to Australian Football (AF) performance through match exercise intensity. Method Twenty-one samples from nine different players completed the yo-yo IR2, and played an Australian Football League match in the first five rounds of the season wearing a global positioning system (GPS) unit. Simple mediation modeling was used to analyze the inter-relationship between yo-yo IR2 score, match exercise intensity and AF performance. Playing position and experience were also incorporated into the model to identify conditional effects. Results & Discussion The results indicate a significant direct relationship between yo-yo IR2 and number of ball disposals (p <0.1). Furthermore, a significant indirect relationship between yo-yo IR2 and number of ball disposals through distance travelled at high intensity (dHI·min) (p <0.1) was found. The results also indicate that playing position impacts the relationship between of yo-yo IR2 and dHI·min (p <0.1) and dHI·min and total ball disposals (p <0.1). Moreover, playing experience significantly impacted the relationship between dHI·min and total ball disposals. Conclusions This study is the first to model the relationship between yo-yo IR2 and number of ball disposals caused by dHI·min in AF incorporating conditional variables, and would be useful to evaluate the effect of a training intervention on performance.
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