Isometric

Isometric exercise is good for muscle tone, but doesn't provide much of a cardiovascular workout.

These have forms such as the cube, octahedron, etc., which belong to the isometric system, and it is in this system that the Diamond crystallizes.

The meter of poetry can be isometric.

isometric exercise

isometric sets

One of the most effective isometric exercises for the deskbound is to sit up quite straight and tighten the large muscles of the buttocks, holding for a count of eight, then release.