こむら返がえり

noun

leg cramp; charley horse

Refers specifically to a sudden, painful muscle cramp in the calf. Common in everyday conversation.

• 夜よ中なかにこむら返がえりが起おきて、飛とび起おきた。

  I woke up with a start when I got a leg cramp in the middle of the night.

• 運うん動どう中ちゅうにこむら返がえりを起おこさないように、水すい分ぶんをしっかり取とってください。

  Make sure to drink plenty of fluids so you don't get a leg cramp during exercise.