in the zone
(idiomatic) In a mental state of focused concentration on the performance of an activity, in which one dissociates oneself from distracting or irrelevant aspects of one's environment.
In the Zone Libre, movements were created as early as in the north and west but did not face decimating raids by the authorities, which allowed movements like Combat, Libération-Sud and Franc-Tireur to have a more expansive character". Source: Internet
What is the difference between being In the Zone and being Under Target? Source: Internet
Even if it weren’t the parent album of one the best singles of this century, Toxic, In the Zone would still warrant a Listener’s Digest nod. Source: Internet