1. to keep fit
I practice many sports to keep fit.
I try to keep fit by playing sport.
2. be in working order
Inglês palavra "być sprawnym"(be in working order) ocorre em conjuntos:
słówka dział 63. be fit
She wants to be fit.
4. get fit
I have to get fit before a trip to the mountains.
I want to lose weight and get fit before my wedding.
I've started going to the gym because I want to get fit.
I want to get fit. I’m so fat.