cannot relax muscles

弱点, 疲労, 脚の筋肉の低下, bodyache

Periodic paralysis is a group of rare genetic diseases that lead to weakness or paralysis (rarely death) from common triggers such as cold, heat, high carbohydrate meals, not eating, stress or excitement and physical activity of any kind. 

アウトを渡します, 動悸, 弱点, change in cognition

Malignant hyperthermia (MH or MHS for "malignant hyperthermia syndrome", or "malignant hyperpyrexia due to anesthesia") is a rare life-threatening condition that is triggered by exposure to drugs used for general anaesthesia, such as volatile anaesthetics or the depolarizing muscle relaxant suxamethonium chloride. 

活動に継続的な筋収縮, 筋肉のけいれんを食べカリウムを含む食品に悪化

Potassium-aggravated myotonia is a rare genetic disorder that affects skeletal muscle. Beginning in childhood or adolescence, people with this condition experience bouts of sustained muscle tensing (myotonia) that prevent muscles from relaxing normally. 

できない熟練の動きを実行します, 活動に継続的な筋収縮, 筋硬直, 難易度リラックス筋肉

Paramyotonia Congenita (PC), also known as Paramyotonia congenita of von Eulenburg or Eulenburg disease, is a rare congenital autosomal dominant neuromuscular disorder characterized by “paradoxical" myotonia. 

動悸, 弱点, 脚の筋肉の低下, 足足の筋肉のけいれん

Myotonic dystrophy (DM) is a chronic, slowly progressing, highly variable inherited multisystemic disease that can manifest at any age from birth to old age. It is characterized by a wasting of the muscles (muscular dystrophy), posterior subcapsular irridescent cataracts (opacity of the lens of the eyes), heart conduction defects, endocrine changes and myotonia (difficulty relaxing a muscle). 

動悸, 指の永久的なたわみ, 顔変形, palpitations with fever

Andersen-Tawil syndrome. also called Andersen syndrome and Long QT syndrome 7 is a form of long QT syndrome. It is a rare genetic disorder, and is inherited in an autosomal dominant pattern. ... 

呼吸困難, 弱点, 脚の筋肉の低下, 運動の制限です

What is Congenital Myopathy? ... 

弱点, 疲労, 脚の筋肉のけいれん, 脚の筋肉の低下

Thomsen disease, a form of Myotonia congenita, is a muscular genetic disorder characterized by muscle stiffness (cramp) and an inability of the muscle to relax after a voluntary contraction. The affected muscle functions normally after a few repetitions. 

嚥下困難, 弱点, 脚の筋肉のけいれん, 脚の筋肉の低下