Muscle hypertrophy

Hypertrophy of muscles throughout the body, large fish, quadriceps, gastrocnemius, etc. can cause throbbing muscle rigidity. Myotonicmyopathies refers to a group of muscle diseases characterized by the difficulty of relaxation of the affected skeletal muscles after contraction, reduction or disappearance after continuous contraction, and cold which can aggravate symptoms. Includes tonic muscular dystrophy, congenital myotonia, and paramyotonia.