Proper Hydration During Ultra-endurance Activities. The American researcher Martin Hoffman from California has put together today’s state of knowledge of the supply of fluid in very long endurance charges. He concludes that the athletes are not allowed to drink too much and there is no reason for an additional supply of salt. There is no reason that a weight loss must be corrected under load due to increased fluid supply. The very insightful article can be found under https://pubmed.ncbi.nlm.nih.gov/30601394/