atletski

1. athletics; track-and-field
   Atletska staza je otvorena za sve građane. — The running track is open to all residents.
   Upisala se u atletski klub. — She joined an athletics club.
2. (of build) athletic
   Ima atletsku građu i široka ramena. — He has an athletic build and broad shoulders.

Atletika in Serbian means track and field, so atletski usually refers to that sport.