From Longman Dictionary of Contemporary Englishisometricsi‧so‧met‧rics /ˌaɪsəˈmetrɪks/ noun [plural] MHDSOexercises that make your muscles stronger by pushing against each other
Examples from the Corpus
isometrics• A twenty-year-old dancer manque did isometrics on his towel, pretending to be oblivious to the stares he attracted.Origin isometrics (1800-1900) Greek isometria “equal measure” 