According to Live About, mustard can help reduce cramping for runners. “The reason for this mustard madness comes down to race day cramping. Many runners especially long-distance obstacle racers and mud runners have a greater chance of experiencing muscle cramps on race day,” the article from Live About reads.
The body uses acetic acid to produce acetylcholine, which is essential for leg muscle contractions. This is why mustard is effective for leg cramp relief. Mustard contains acetic acid. Yellow Mustard is the only kind of mustard documented to relieve nighttime leg cramps.