Meanings
uncountablepractice (degree of being used to and proficient in some activity)
Die Übungen in Turnen entspannen sehr.
countablepractice; exercise; training; workout; drill; maneuver (the usually repeated performance of an activity for the sake of improvement and learning)
countablea kind of university class where skills taught in lectures or seminars are exercised (similar to a Tutorium, but more likely to be obligatory and taught by proper staff)
Examples
GermanEnglish
Maria gibt den Schülern Übungen auf.Mary sets the pupils exercises.
Die Übungen sind einfach und wirksam.The exercises are simple and effective.