- exercise or a program of exercises to strengthen specific muscles or shape the figure by pitting one muscle or part of the body against another or against an immovable object in a strong but motionless action, as by pressing the fist of one hand against the palm of the other or against a desk.
- any specific exercise of this type.
Origin of isometric exercise
First recorded in 1965–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- Exercise performed by the exertion of effort against a resistance that strengthens and tones the muscle without changing the length of the muscle fibers.