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isometric exercise

noun
  1. 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.
  2. any specific exercise of this type.
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Origin of isometric exercise

First recorded in 1965–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

isometric exercise in Medicine

isometric exercise

n.
  1. Exercise performed by the exertion of effort against a resistance that strengthens and tones the muscle without changing the length of the muscle fibers.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.