Why is Yo-Yo test an important criteria for selection: CoA

(G.N.S) DT.25 The Indian cricket team management may consider the Yo-Yo test as the most important selection criteria. However, after the fiasco which surrounded Ambati Rayudu, things might change soon. Rayudu had failed his endurance test and was dropped from the squad. CoA chief Rai is likely to meet the BCCI officials