Sodium Intake During an Ultramarathon Does Not Prevent Muscle Cramping, Dehydration, Hyponatremia, or Nausea. Generally, ultra raptor think that a supply of minerals like sodium is important to avoid problems such as muscle cramps, dehydration and hyponatemia. An American group examined at a 100 miles barrel whether there is a connection between sodium supply and the problems mentioned.In the case of a run with temperatures to almost 40 degrees, together with laboratory values were also completed questionnaires.
It was surprisingly no connection between sodium supply and problems such as muscle cramps. The whole study can be found under https://pubmed.ncbi.nlm.nih.gov/26709371/