cramper
/ˈkræm.pər/Definitions
1. noun
A person who suffers from or is prone to muscle cramps, especially in the legs or calves.
“After a long hike, she became a regular crampers and had to take regular breaks to stretch her legs.”
2. verb
To cause or suffer from muscle cramps, especially in the legs or calves.
“He began to cramper during the soccer game and had to be substituted out.”