continuous muscle spasm; increased muscular irritability and tendency to contract, and lessened ability to relax

abnormal slowness of muscle relaxation after a voluntary or provoked contraction (for example a handshake that the patient has trouble releasing).

inability to relax muscles voluntarily

abnormally long muscular contractions; slow relaxation of a muscle after a contraction

Difficulty relaxing muscles after contraction.

Failure of immediate muscle relaxation after voluntary contraction has stopped.

A condition in which muscles are slow to relax after contracting (muscle stiffness). search for Myotonia

inability to relax muscles after contraction.

Myotonia is increased muscular irritability with decreased power of relaxation; spasm of the muscle.

Tonic spasm of a muscle or temporary rigidity after muscular contraction.

Myotonia is a neuromuscular disorder characterized by the slow relaxation of the muscles after voluntary contraction or electrical stimulation. Generally, repeated effort is needed to relax the muscles, and the condition improves after the muscles have warmed-up. However, prolonged, rigorous exercise may also trigger the condition.