1. Muscle-building exercises (or a system of muscle-building exercises) involving muscular contractions against resistance without movement (the muscles contract but the length of the muscle does not change)
   "Isometrics can be useful for strength training when space or equipment is limited";
   - isometric exercise

1. A line connecting isometric points
   "The engineer drew isometric lines to represent the three-dimensional object on paper";
   - isometric line

Type of: exercise, exercising, line, physical exercise, physical exertion, workout

Encyclopedia: Isometrics