Current studies have revealed that muscular twitches produced by a very low frequency (1 Hz) effectively relieve contraction phenomena or reduce the muscle tension at rest of the muscles stimulated in this way.

This type of treatment, called tonolysis, is indicated for relief from acute contractures (torticollis, lumbago, etc.). It allows also for a reduction in the muscular tension at rest of certain muscles and thus facilitates manipulations.

When treating spasticity, it is recommended to use programmes specially designed for this condition and to stimulate the spastic muscles' antagonists.