Definition of isometrics noun from the Oxford Advanced Learner's Dictionary

 

isometrics

 noun
noun
BrE BrE//ˌaɪsəˈmetrɪks//
 
; NAmE NAmE//ˌaɪsəˈmetrɪks//
 
[plural]
 
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physical exercises in which the muscles work against each other or against a fixed object
See the Oxford Advanced American Dictionary entry: isometrics