This is the 15988th most frequent Polish word.
treningowych
"Training" or "training-related."
The word 'treningowych' describes the type of shoes, indicating they are for training purposes.
Kupiłem nowe buty treningowe.
I bought new training shoes.
Here, 'treningowy' (part of 'plan treningowy') describes a plan intended for training purposes.
Plan treningowy przygotowałem na nadchodzący tydzień.
I prepared a training plan for the upcoming week.
The word 'treningowych' is used here to describe the type of equipment, denoting its training-related function.