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Definition of Exercise, isometric
Medically reviewed by Min Clinic Staff | Updated: January 2026
Exercise, isometric: Exercise involving muscular contractions without movement of the involved parts of the body. Isometric exercise is one method of muscular exercise. In contrast, isotonic exercise occurs when a contracting muscle shortens against a constant load, as when lifting a weight.
Isometric comes from the Greek "iso-", equal + "metron", measure = maintaining the same measure, dimension or length.