/ Thesaurus / I Synonyms of isotonic exercise Find synonyms for: Noun1. isotonic exercise, exercise, exercising, physical exercise, physical exertion, workoutusage: exercise in which opposing muscles contract and there is controlled movement (tension is constant while the lengths of the muscles change); "the classic isotonic exercise is lifting free weights"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language