Questions & Answers about Podczas treningu biegamy coraz dalej po parku.
In Polish, the preposition podczas (during) always takes the genitive case.
- trening – nominative (dictionary form)
- treningu – genitive singular
So:
- podczas + genitive → podczas treningu = during training
Other examples:
- podczas lekcji (lekcja → lekcji) – during the lesson
- podczas weekendu (weekend → weekendu) – during the weekend
Using podczas trening would be ungrammatical, because trening is nominative, not genitive.