Electrolyte powder, rehydration solutions, and sports drinks may seem like the same thing – all are mixed with water and contain salts. But they are formulated for entirely different purposes, and choosing the wrong one can mean you don’t get what you actually need. The Difference in Brief Rehydration solution is primarily developed to treat […]

Sodium is the electrolyte you lose most of when you sweat, and during running and other endurance training, losses can be significant. Here, we review what research says about how much sodium you actually lose, what factors influence it, and how to approach replenishment. Why Sodium is the Most Important Electrolyte in Sweat Sweat contains

Drinking too much water during a long workout might sound harmless, but if sodium levels in the blood drop too low, a condition called hyponatremia occurs. It is one of the most serious yet most preventable risks in endurance training. What is hyponatremia? Hyponatremia means that the concentration of sodium in the blood falls below