Hello, after sweating a lot, electrolytes such as sodium salt are also lost in the body. If you drink plenty of boiled water at this time without supplementing salt, muscle twitching or muscle spasmodic pain will occur. So people had better put some salt or drink salty soda when drinking water. If you are not used to drinking salty drinks, stir-fry the vegetables and eat them salty. In this way, the lost salt and water can be replenished.